delivered the opinion of the court:
At a bench trial in the circuit court of La Salle County, the parties stipulated that defendant, Gregory Tisler, had possessed less than 30 grams of LSD. This crime constituted a Class 4 felony under the Illinois Controlled Substances Act (Ill. Rev. Stat. 1979, ch. 56V2, par. 1402(b)). Defendant was convicted and sentenced to 24 months’ probation and one weekend in the La Salle County Correctional Center. In addition, defendant was *231fined $500 and ordered to pay costs of $120.
Before trial, defendant moved to suppress evidence that he claimed was obtained either through an illegal seizure or through a search incident to an illegal arrest. The trial court, after hearing testimony, denied the motions and allowed the evidence.
Defendant appealed, and the appellate court reversed the judgment without remand. Finding that defendant’s arrest was without probable cause, the appellate court held that all evidence obtained as a result of the arrest must be suppressed. (114 Ill. App. 3d 214, 216.) We allowed the State’s petition for leave to appeal, which was filed pursuant to Supreme Court Rules 315(a) and 612(b). 87 Ill. 2d Rules 315(a), 612(b).
Before this court, the State raises the issue whether the trial court properly denied defendant’s motions to suppress evidence. We will address this question after a statement of the pertinent facts. Our disposition of this first issue renders it unnecessary to consider a second issue that the State raises in its brief.
James Hollenbeck, a police officer for the city of Marseilles, testified at the hearing on the motions to suppress. While off duty on Saturday, January 9, 1982, Hollenbeck received a telephone call at 2:30 p.m. from an informant. The caller identified himself, and the officer recognized him as an informant that he had dealt with before. The caller then related the following information: that at the time they were speaking, two Marseilles residents were on their way to Streator to pick up “some hits” of LSD. After they obtained the LSD, the two individuals — defendant Tisler and a friend, Jerry Cox — would return to Marseilles at 3:40 p.m., a little over an hour hence. They would be riding in Tisler’s car, a green, two-door Chevrolet Camaro with the letters “JAT” on its license plates. After they entered Marseilles via the river bridge, Tisler and Cox would proceed *232north on Main Street to the Number Nine Game Room. There, they would deliver the LSD.
The informant also stated that the LSD would be in a very small container which easily could be disposed of if Hollenbeck were to detain Tisler and Cox with an ordinary traffic stop. Therefore, the informant advised, Hollenbeck should approach the subjects only after they had parked at the Game Room and were out of the car.
Hollenbeck had worked with this informant twice before, and the informant’s tips had always been accurate. In one case, a single tip resulted in arrest and conviction. The other case involved the informant’s supplying information at several times during a four- to six-week period. Again, the information led to an arrest and conviction. Tips supplied by this informant, however, had never been used by Hollenbeck or his police department to obtain a search or arrest warrant.
Certain aspects of the tip were familiar to Hollenbeck. He knew Tisler and Cox, and, to the best of his knowledge, Tisler was a Marseilles resident. He knew Tisler’s car, recalling it as a lime green, two-door Chevrolet Camaro. He also knew that its full license plate number was JAT 76. Hollenbeck recognized the Number Nine Game Room as a Marseilles business that served as a hangout for local teenagers. Finally, he knew that several routes led from Streator to Marseilles, but that the road leading over the river bridge was the shortest, most direct route.
After the telephone call, Hollenbeck sought help in obtaining a warrant. Since it was Saturday, he knew that judges’ offices were closed. In such a case, the La Salle County procedure was to contact an assistant State’s Attorney and advise him of the facts on which the officer based his suspicions. If the assistant State’s Attorney thought the facts would support a probable-cause finding, he would meet with the officer, draft a warrant, and *233contact a judge at home to request his signature. Although this procedure usually took from two to three hours, Hollenbeck attempted to contact the first assistant State’s Attorney at home and at his office. Unsuccessful, he left a message for the attorney to call right away. After failing to reach another assistant State’s Attorney at home, Hollenbeck proceeded without a warrant.
Hollenbeck and Officer Stevenson drove to South Main Street in Marseilles and parked where they could watch the river bridge. They wore street clothes and traveled in Hollenbeck’s private car, an Oldsmobile with no police insignia or equipment. The winter weather that day was unusually severe: Hollenbeck testified that the temperature was 25 degrees below zero with a wind-chill factor of 60 degrees below zero. Snow fell, and area roads were becoming impassable.
At 3:45 p.m., the officers saw a green Chevrolet Cámaro approach from the south, from the direction of the river bridge. The officers had not seen the car cross the bridge. On the Camaro’s license plates was the number “JAT 76.” Defendant was driving, Jerry Cox sat in front on the passenger side, and a third male, unknown to the officers, rode in the back seat.
Hollenbeck pulled in directly behind defendant’s car and followed for about three blocks as defendant proceeded north on Main Street. When defendant parked across the street from the Number Nine Game Room, the officers left Hollenbeck’s car and approached the Cámaro.
Defendant stepped out of his car and Hollenbeck saw that his left hand was closed. What looked like a plastic bag extended from defendant’s fist, but the officer could not see what its contents might be. While defendant stood between his car and its still open door, Hollenbeck asked him what he was holding. Defendant replied, *234“Nothing,” so Hollenbeck inquired again, explaining to defendant that he could see something in his hand. At this point, defendant started to move his left hand around behind his back.
Hollenbeck then took defendant’s left hand and removed a small plastic bag. It contained several pills, which the officer recognized as “dots.” As Hollenbeck retrieved the plastic bag, he placed defendant under arrest. The officers then searched the area immediately surrounding defendant. After being patted down and handcuffed, defendant was taken to the police station in a squad car that waited nearby. Sometime after the arrest, a forensic scientist’s report disclosed that the pills taken from defendant contained LSD.
Austin Tisler, defendant’s father, also testified at the hearing on the motions to suppress. Mr. Tisler was familiar with the Number Nine Game Room. He described it as a pool room with game devices — a “soda fountain for teenagers.” He was aware that defendant, his 17-year-old son Greg, frequented the Game Room. When asked how often his son visited the establishment, Mr. Tisler estimated that defendant stopped at the Game Room once a day.
Before proceeding, we note that the trial court viewed the police conduct in this case as a warrantless arrest accompanied by a search incident to arrest. We will treat the facts in the same manner. It follows, then, that the central issue is the legality of the warrantless arrest. If probable-cause requirements were met before the arrest, then evidence seized during the search incident to arrest was properly admitted at trial.
We now address whether the trial court correctly found that probable cause existed for defendant’s arrest. While stressing the informant’s past reliability, the State maintains that the tip in this case is sufficiently detailed to be self-verifying in nature. According to the State, the *235detailed tip, when considered in light of the officers’ corroboration of the details, is sufficient to justify the trial court’s finding of probable cause. Therefore, the State reasons, the LSD seized in the search incident to arrest was legally obtained and properly admitted into evidence. The State argues that the appellate court, which reversed and excluded the evidence, reached an incorrect result because it failed to consider either the self-verifying details or the subsequent corroboration.
Defendant, on the other hand, denies that the officers had probable cause for his arrest. Therefore, he argues, the police conduct violated his rights under the United States and Illinois constitutions. Defendant claims that, under these circumstances, the trial court should have excluded the LSD and other items seized at the time of the arrest. His theory is based on the informant’s failure to explain how he learned the information that he related by telephone to Hollenbeck. Defendant explains that, for all Hollenbeck knew at the time of arrest, the tip was based on a casual rumor or even was wholly fabricated by someone who knew of defendant’s routine visits to the Game Room. Given the absence of a statement from the informant assuring that he obtained his story reliably, defendant contends that the information known to the officers did not meet constitutional standards for probable cause. Defendant rejects the notion that the tip was sufficiently detailed or corroborated to cure this deficiency.
The fourth amendment to the United States Constitution guarantees the right to be free from unreasonable search and seizure. The amendment specifies that “no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.” (U.S. Const., amend. IV.) With respect to unreasonable search and seizure, as well as to the issuance of *236warrants, the language of the 1970 Illinois Constitution is nearly identical to that of the Federal guarantee. Ill. Const. 1970, art. I, sec. 6.
In reference to Federal and State warrant requirements, this court has explained that a detached judicial officer must resolve the question of whether probable cause exists to justify issuing a warrant. The decision is to be based on information contained in sworn statements or affidavits that are presented to the magistrate. (People v. Greer (1981), 87 Ill. 2d 89, 92.) Whether probable cause exists in a particular case turns on the “totality of the circumstances and facts known to the officers and court when the warrant is applied for.” (People v. Free (1983), 94 Ill. 2d 378, 400.) The probability of criminal activity, rather than proof beyond a reasonable doubt, is the standard for determining whether probable cause is present. (Spinelli v. United States (1969), 393 U.S. 410, 419, 21 L. Ed. 2d 637, 645, 89 S. Ct. 584, 590; People v. Exline (1983), 98 Ill. 2d 150, 154.) Whether the necessary probability exists is governed not by technical legal rules, but rather by common-sense considerations that are factual and practical. Brinegar v. United States (1949), 338 U.S. 160, 175, 93 L. Ed. 1879, 1890, 69 S. Ct. 1302, 1310; People v. Mitchell (1970), 45 Ill. 2d 148, 153-54.
When a police officer has proceeded without a warrant to search, seize evidence, or arrest a person, the trial court making a probable-cause determination is to apply standards at least as stringent as those that guide a magistrate in deciding whether to issue a warrant. (People v. Johnson (1983), 94 Ill. 2d 148, 153.) The Code of Criminal Procedure of 1963 allows a warrantless arrest only when a peace officer “has reasonable grounds to believe that the person is committing or has committed an offense.” (Ill. Rev. Stat. 1983, ch. 38, par. 107— 2(l)(c).) As used in the statute, “reasonable grounds” is *237considered to have the same substantive meaning as “probable cause.” People v. Wright (1974), 56 Ill. 2d 523, 528-29, quoting Brinegar v. United States (1949), 338 U.S. 160, 175-76, 93 L. Ed. 1879, 1890, 69 S. Ct. 1302, 1310-11.
To determine whether a warrantless arrest meets the reasonable-grounds/probable-cause requirement, the trial court must decide whether “a reasonable and prudent man, having the knowledge possessed by the officer at the time of the arrest, would believe the defendant committed the offense.” (People v. Wright (1968), 41 Ill. 2d 170, 174.) In determining whether the officer had probable cause, the officer’s factual knowledge, based on his prior law-enforcement experience, is relevant. (People v. Smith (1983), 95 Ill. 2d 412, 419-20.) If the trial court finds that a warrantless arrest was based on probable cause, the arrest is deemed lawful, and evidence obtained during a warrantless search incident to that arrest is admissible to prove defendant’s guilt. People v. Wright (1968), 41 Ill. 2d 170, 173; People v. McCray (1965), 33 Ill. 2d 66, 69, affd (1967), 386 U.S. 300, 18 L. Ed. 2d 62, 87 S. Ct. 1056; see also Ill. Rev. Stat. 1983, ch. 38, par. 108—1; Chimel v. California (1969), 395 U.S. 752, 23 L. Ed. 2d 685, 89 S. Ct. 2034 (limiting the scope of a search incident to arrest to the area within defendant’s reach).
A police officer need not have observed personally the facts that he presents to a magistrate making a probable-cause determination. The officer’s statements may be based on hearsay, and frequently such hearsay statements originate with an informant’s tip. If facts supplied in a particular tip are essential to a finding of probable cause, the tip must meet standards of reliability before the magistrate may consider it in his determination. In Illinois v. Gates (1983), 462 U.S. 213, 76 L. Ed. 2d 527, 103 S. Ct. 2317, the Supreme Court held that a *238magistrate should look to the totality of the circumstances when assessing an affidavit that relies on an informant’s story:
“The task of the issuing magistrate is simply to make a practical, common-sense decision whether, given all the circumstances set forth in the affidavit before him, including the ‘veracity’ and ‘basis of knowledge’ of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place.” (Illinois v. Gates (1983), 462 U.S. 213, 238, 76 L. Ed. 2d 527, 548, 103 S. Ct. 2317, 2332.)
The Supreme Court in Gates thus reaffirmed that the reliability of hearsay statements, as measured by the informant’s veracity and basis of knowledge, is highly relevant to the existence of probable cause. Scrutiny of these factors, the court observed, is to guide a magistrate who must make a probable-cause determination. 462 U.S. 213, 230-31 n.6, 76 L. Ed. 2d 527, 543 n.6, 103 S. Ct. 2317, 2328 n.6.
The Gates court also reaffirmed other methods established in its prior opinions for evaluating a tip. The court again emphasized the value of independent police investigation that corroborates the details of an informant’s story. (462 U.S. 213, 241-45, 76 L. Ed. 2d 527, 550-52, 103 S. Ct. 2317, 2334-35.) When a tip is proved accurate on some counts, the court explained, the informant is more likely correct about other details, including the alleged illegal activity. (462 U.S. 213, 244, 76 L. Ed. 2d 527, 552, 103 S. Ct. 2317, 2335 quoting from Spinelli v. United States (1969), 393 U.S. 410, 427, 21 L. Ed. 2d 637, 650, 89 S. Ct. 584, 594 (White, J., concurring).) Corroboration operates in this way to reduce the risk that an informant’s tip stems from an inaccurate rumor or a fabricated story. 462 U.S. 213, 244-45, 76 L. Ed. 2d 527, 552, 103 S. Ct. 2317, 2335.
After recognizing the continued importance of corrob*239oration, the Supreme Court in Gates restated the principle that a tip containing a wide range of detail — which would have been difficult to obtain or predict — may support an inference of reliability. A properly detailed tip suggests that the informant obtained his story in a reliable fashion, from either the alleged wrongdoer or from someone closely related to the criminal conduct. 462 U.S. 213, 245, 76 L. Ed. 2d 527, 552-53, 103 S. Ct. 2317, 2335-36; see Spinelli v. United States (1969), 393 U.S. 410, 416, 21 L. Ed. 2d 637, 644, 89 S. Ct. 584, 589.
By adopting the totality-of-circumstances approach, the United States Supreme Court abandoned its former test for assessing the reliability of an informant’s tip. Before Gates, the standard for evaluating a tip required that a police officer seeking a warrant disclose certain underlying circumstances: those from which the informant drew his conclusions and those from which the police officer concluded that his informant was credible. Aguilar v. Texas (1964), 378 U.S. 108, 114-15, 12 L. Ed. 2d 723, 729, 84 S. Ct. 1509, 1514.
These requirements became well known as the “Aguilar two-pronged test,” and the test also was applied to probable-cause questions that arose from warrantless arrests and searches. The first or “basis of knowledge” prong required the magistrate to assess an informant’s statements regarding how he learned the information. The second or “veracity” prong required an evaluation of either the informant’s past record of truthfulness or facts indicating that the present information was reliable. (1 W. LaFave, Search and Seizure sec. 3.3, at 501-02 (1978).) The Aguilar test was designed to insure that the inferences which led to a finding of probable cause would be drawn by the magistrate, and not by the police officer or his informant. Aguilar v. Texas (1964), 378 U.S. 108, 115, 12 L. Ed. 2d 723, 729, 84 S. Ct. 1509, 1514.
*240Under interpretations of Aguilar, each prong of the test involved an independent and distinct evaluation. When an informant’s story contained facts sufficient to meet only one of the two prongs, the tip could not be used, even where the facts which supported the one prong indicated a fair probability that the tip was reliable. However, if the magistrate found that the tip satisfied both of the Aguilar prongs, he could consider the informant’s tip when he made the probable-cause determination. See generally 1 W. LaFave, Search and Seizure sec. 3.3(b) (1978).
The Supreme Court’s decision to replace the two-pronged test was prompted by the inflexible manner in which lower courts had applied the test. The court explained in Gates that it never had intended the rigid compartmentalization that had developed around the Aguilar-Spinelli standards. (Illinois v. Gates (1983), 462 U.S. 213, 229-30 & n.6, 76 L. Ed. 2d 527, 542-43 & n.6, 103 S. Ct. 2317, 2327-28 & n.6.) Informants’ tips, the court stated, are simply too diverse to effectively be measured with a set of rigid legal rules. “[T]he ‘two-pronged test’ has encouraged an excessively technical dissection of informants’ tips, with undue attention being focused on isolated issues that cannot sensibly be divorced from the other facts presented to the magistrate.” 462 U.S. 213, 234-35, 76 L. Ed. 2d 527, 545-46, 103 S. Ct. 2317, 2330.
The Gates court reaffirmed its concern that the informant be trustworthy, and it stressed that the probable-cause decision still rests with a neutral magistrate. (462 U.S. 213, 239 & n.ll, 76 L. Ed. 2d 527, 548-49 & n.ll, 103 S. Ct. 2317, 2332-33 & n.ll.) However, the court held that, in this context, probable-cause analysis should no longer be directed into two independent channels. Under the totality-of-circumstances approach, a deficiency with respect to one of the Aguilar requirements *241can be overcome “by a strong showing as to the other, or by some other indicia of reliability.” 462 U.S. 213, 233, 76 L. Ed. 2d 527, 545, 103 S. Ct. 2317, 2329.
Before applying the totality-of-circumstances standard to the case at bar, we consider defendant’s arguments that Aguilar-Spinelli standards should govern this case. Defendant argues that as a matter of State constitutional law, this court should reject the Gates approach and retain the Aguilar two-pronged test. Explaining that Gates sets a bare minimum standard, defendant points out that Illinois may afford its citizens greater protection than that provided by the United States Constitution. Defendant states that the drafters of article I, section 6, of the 1970 Illinois Constitution intended to expand the right of Illinois citizens to be free from unreasonable police conduct. Fearing that the more flexible Gates approach will undermine both the magistrate’s role and the probable-cause standard, defendant urges this court to reject the totality-of-circumstances approach.
We reject defendant’s contention that State protection in this particular context was intended to be more extensive than that provided at the Federal level. Defendant asserts that article I, section 6, of the 1970 Illinois Constitution guarantees more individual rights than either the former State Constitution or the fourth amendment to the Federal Constitution. In the committee report to the constitutional convention that accompanied the present Illinois section, the drafters stated their intent that changes to the section would accomplish two specific goals: First, the new language would provide citizens with express protection against eavesdropping derices. Second, the section now would protect against invasions of privacy. Proposals to change other aspects of article I, section 6, were rejected in committee. As a result, the language pertinent to the case at bar — the *242warrant clause with its probable-cause requirement, and the guarantee against unreasonable search and seizure-remains nearly the same as that of the fourth amendment. (6 Record of Proceedings, Sixth Illinois Constitutional Convention 29, 33 (hereafter cited as Proceedings).) Thus, the intent of the constitutional convention was to extend the protection afforded by the fourth amendment of the Federal Constitution and of our 1870 State Constitution to cover eavesdropping and to protect against invasions of privacy. The explanation to the voters prior to the adoption of the 1970 Constitution simply states: “This is an amended version of Article II, Section 6 of the 1870 Constitution expanded to include guarantees of freedom from unreasonable eavesdropping and invasions of privacy. The restriction on warrants is unchanged.” (See 7 Proceedings 2683.) The conventiqn manifested no intent to expand the nature of the protection afforded by the fourth amendment of the Federal Constitution. (See People v. Hoskins (1984), 101 Ill. 2d 209.) In G. Braden & R. Cohn, The Illinois Constitution: An Annotated and Comparative Analysis 28 (1969), a book prepared for the Illinois Constitution Study Commission in preparation for the 1970 constitutional convention, in discussing the 1870 Constitution, it is stated that the fourth amendment to the United States Constitution is the direct and lineal ancestor of the protection afforded by the Illinois Constitution. Both constitutional provisions were designed to protect against the same abuses. (See People v. Grod (1944), 385 Ill. 584, 586.) The difference in the language of the 1970 Constitution from that found in the 1870 Constitution and the fourth amendment of the Federal Constitution, to which defendant refers, does no more than specifically provide for fourth amendment protection with regard to eavesdropping and invasion of privacy.
With respect to the basic requirements that stem *243from the language of our constitution, this court has considered that the State and Federal constitutions impose the same restrictions. (See, e.g., People v. Greer (1981), 87 Ill. 2d 89, 92.) In both People v. Greer (1981), 87 Ill. 2d 89, 92, and People v. Gates (1981), 85 Ill. 2d 376, 381-82, this court referred to both the protection of the fourth amendment to the Federal Constitution and of article I, section 6, of the Illinois Constitution of 1970. In each case we held the search invalid because the informant’s tip did not comply with the Aguilar test. In doing so, we were not establishing the Aguilar test as defining the extent of the protection afforded by the Illinois Constitution. Those decisions, in effect, held that the protection against unreasonable searches under the Illinois Constitution is measured by the same standards as are used in defining the protection against unreasonable searches contained in the fourth amendment to the United States Constitution.
Both our constitution and the Federal Constitution protect individuals against unreasonable searches. Both constitutions provide that no warrant shall issue without probable cause. Subject to the limitations noted later, this court may construe these terms as contained in our constitution differently from the construction the Supreme Court has placed on the same terms in the Federal Constitution. Indeed, Justice White, in his Gates concurrence, observed that “[t]he Illinois Supreme Court may decide to retain the [Aguilar] test for purposes of the State Constitution.” (Illinois v. Gates (1983), 462 U.S. 213, 252, 76 L. Ed. 527, 557, 103 S. Ct. 2317, 2339 (White, J., concurring).) However, this court has, in the past, in construing provisions of our constitution, elected to follow the decisions of the Supreme Court rendered in construing similar provisions of the Federal Constitution. In People v. Jackson (1961), 22 Ill. 2d 382, the validity of a search warrant issued on a complaint based partly on *244hearsay was involved. The court relied on a decision of the Supreme Court which held that hearsay may be used to establish probable cause for a warrant and stated: "We have indicated before that we will follow the decisions of the United States Supreme Court on identical State and Federal constitutional problems.” (People v. Jackson (1961), 22 Ill. 2d 382, 287.) The Jackson court cited People v. Tillman (1953), 1 Ill. 2d 525, which upheld a warrantless search incident to an arrest. In doing so, the Tillman court cited both prior decisions of this court and a decision of the United States Supreme Court, and stated:
“The provision of the constitution of the United States, relied upon by plaintiff in error, while in somewhat different language, is in effect the same, and the provisions of the two constitutions are construed alike and should be liberally construed in favor of the accused.” (People v. Tillman (1953), 1 Ill. 2d 525, 529.)
In Wilson v. Schnettler (1961), 365 U.S. 381, 384 n.2, 5 L. Ed. 2d 620, 623 n.2, 81 S. Ct. 632, 634 n.2, the Supreme Court noted that the language of article II, section 6, of the Illinois Constitution of 1870 is substantially the same language as the fourth amendment and that this State’s "interpretation of its constitutional provision and its exclusionary rule, similar to the one followed in the federal courts, makes the Illinois law accord with the principles established by this Court for the federal system.”
Also, in People ex rel. Hanrahan v. Power (1973), 54 Ill. 2d 154, this court considered the constitutional provision against self-incrimination in the fifth amendment of the Federal Constitution and in section 10 of article I of the Illinois Constitution of 1970, and section 10 of article II of the Illinois Constitution of 1870. Noting the minor differences in language, this court stated: “The two provisions differ in semantics rather than in substance and *245have received the same general construction.” People ex rel. Hanrahan v. Power (1973), 54 Ill. 2d 154, 160.
After having accepted the pronouncements of the Supreme Court in deciding fourth amendment cases as the appropriate construction of the search and seizure provisions of the Illinois Constitution for so many years, we should not suddenly change course and go our separate way simply to accommodate the desire of the defendant to circumvent what he perceives as a narrowing of his fourth amendment rights under the Supreme Court’s decision in Illinois v. Gates. Any variance between the Supreme Court’s construction of the provisions of the fourth amendment in the Federal Constitution and similar provisions in the Illinois Constitution must be based on more substantial grounds. We must find in the language of our constitution, or in the debates and the committee reports of the constitutional convention, something which will indicate that the provisions of our constitution are intended to be construed differently than are similar provisions in the Federal Constitution, after which they are patterned.
Decisions involving the exclusionary rule and the Illinois Constitution’s article I, section 6, require that we carefully balance the legitimate aims of law enforcement against the right of our citizens to be free from unreasonable governmental intrusion. (People v. Smith (1983), 95 Ill. 2d 412, 422.) With this in mind, we note our agreement with the Gates conclusion regarding the Aguilar standard. The two-pronged test correctly stressed reliability, but its rigid rules were inconsistent with a nontechnical, common-sense approach to the probable-cause requirement. Like the Supreme Court, we think that the totality-of-circumstances approach will achieve a fairer balance between the relevant public and private interests. (See Illinois v. Gates (1983), 462 U.S. 213, 239, 76 L. Ed. 2d 527, 548, 103 S. Ct. 2317, 2332.) *246Accordingly, we adopt the Gates standard for resolving probable-cause questions under the Illinois Constitution that involve an informant’s tip.
Defendant argues alternatively that, if adopted by this court, the Gates approach should only be applied prospectively. Because the arrest in this case occurred before the Supreme Court decided Gates, defendant maintains that the police conduct here should be measured against the Aguilar standard.
In United States v. Johnson (1982), 457 U.S. 537, 562, 73 L. Ed. 2d 202, 222, 102 S. Ct. 2579, 2594, the Supreme Court held that a decision adopting a new fourth amendment rule should be applied retroactively to all cases pending on appeal at the time" of the decision. The Supreme Court excepted from this holding any decision that represents a “ ‘clear break with the past,’ ” and the court indicated that nonretroactivity was proper for such a case. (457 U.S. 537, 549, 73 L. Ed. 2d 202, 213-14, 102 S. Ct. 2579, 2587; see 3 W. LaFave, Search and Seizure sec. 11.5, at 273, 275-76 (Supp. 1984).) Accordingly, defendant proclaims Gates to be a clear break from the Aguilar standard, so that prospective application of Gates is required. The State, on the other hand, cites United States v. Mendoza (5th Cir. Mar. 19, 1984), 35 Crim. L. Rep. (BNA) 2035, as support for its assertion that Gates is not within the dear-break exception and is therefore retroactively applicable under the general rule of Johnson.
We find it unnecessary to resolve this disagreement, because, in our view, United States v. Johnson does not control the case at bar. The Supreme Court in Johnson was concerned with the retroactive application of Payton v. New York (1980), 445 U.S. 573, 63 L. Ed. 2d 639, 100 S. Ct. 1371, a decision that expanded fourth amendment protection. Because the Gates approach is considered to be less beneficial to defendants than the Aguilar test *247that it replaced, Johnson does not govern the retroactivity issue that Gates presents. See People v. Smith (1983), 95 Ill. 2d 412, 421; 3 W. LaFave, Search and Seizure sec. 11.5, at 276 (Supp. 1984).
Looking to the pre-Johnson balancing test, which would appear to govern cases that are unaffected by Johnson, we note that the foremost factor to be considered is the purpose that the new standard is to serve. If this purpose does not indicate whether retroactive application is appropriate, then the extent of reliance on the former standard and the effect of retroactive application on the administration of justice are also considered. Stovall v. Denno (1967), 388 U.S. 293, 297, 18 L. Ed. 2d 1199, 1203, 87 S. Ct. 1967, 1970; People v. Laws (1981), 84 Ill. 2d 493, 499-500.
Here, the purpose factor favors retroactivity. The purpose of the Gates holding is to prevent overly technical legal rules from excluding evidence in cases where a common-sense view of all the circumstances indicates that the probable-cause requirement is satisfied. A retroactive application of Gates clearly will advance this purpose in pending cases, but will in no way interfere with the deterrence objectives of the exclusionary rule. Since Gates makes admissible evidence that will be seized in future cases by police conduct similar to that in this case, suppressing this evidence will have no deterrent effect upon such conduct. Suppressing evidence now on the basis of Aguilar “would make sense only if there was some reason to believe that otherwise police might violate other Supreme Court decisions in the expectation that the Court would abandon them.” 3 W. LaFave, Search and Seizure sec. 11.5, at 699 (1978).
In People v. Smith (1983), 95 Ill. 2d 412, this court considered the retrospective application of United States v. Ross (1982), 456 U.S. 798, 72 L. Ed. 2d 572, 102 S. Ct. 2157, which holding narrowed a protection afforded *248by the fourth amendment. In that case, also, we concluded that retrospective application would comport with the pre-Johnson balancing test for determining whether a new constitutional decision should be applied retrospectively. In considering the question of legitimate reliance on the previous law as proclaimed by the Supreme Court, we noted in Smith that no legitimate reliance interests would be affected by the prospective application of the Ross standard and quoted the following from that case:
“ ‘Any interest in maintaining the status quo that might be asserted by persons who may have structured their business of distributing narcotics or other illicit substances on the basis of judicial precedents clearly would not be legitimate.’ ” People v. Smith (1983), 95 Ill. 2d 412, 422, quoting United States v. Ross (1982), 456 U.S. 798, 824 n.33, 72 L. Ed. 2d 572, 593 n.33, 102 S. Ct. 2157, 2172 n.33.
Recently the Supreme Court, although it did not discuss retroactivity, nonetheless applied Gates retroactively in Massachusetts v. Upton (1984), 466 U.S._, 80 L. Ed. 2d 721, 104 S. Ct. 2085. We consider the rationale of Smith applicable in our case. For these reasons, we hold that Gates has retrospective application.
We now consider whether, in view of all the circumstances presented to the trial court, the arrest was unlawful under the holding in Gates. Initially, we note that a reviewing court will not disturb a trial court’s finding on a motion to suppress, unless that finding is manifestly erroneous. (People v. Reynolds (1983), 94 Ill. 2d 160, 165; People v. Haskell (1968), 41 Ill. 2d 25, 30.) In Gates, the Supreme Court stated that our task on review is simply to ensure that the trial court had a substantial basis for concluding that probable cause existed. Illinois v. Gates (1983), 462 U.S. 213, 238-39, 76 L. Ed. 2d 527, 548, 103 S. Ct. 2317, 2332.
*249There is no doubt that Hollenbeck could consider his informant to be a reliable source. This court has regarded as believable an informant whose past tips have led to “pending” arrests. (People v. Thomas (1975), 62 Ill. 2d 375, 382.) “[CJourts have with virtual unanimity held that a declaration that the informant’s past information has led to convictions is a sufficient showing of the informer’s credibility.” (1 W. LaFave, Search and Seizure sec. 3.3, at 509 (1978).) As noted above, the informant’s information had led to arrests and convictions on two occasions. In one of the cases, the informant consistently supplied accurate information over an extended period. While the facts do not indicate that the prior tips pertained to drug possession, there is no requirement that the informant be an expert in a given area. The relevant consideration is instead the informant’s ability to truthfully report timely information. 1 W. LaFave, Search and Seizure sec. 3.3, at 520 (1978).
We have also noted that, before defendant’s arrest, Hollenbeck and Stevenson had corroborated many details of the informant’s story. The officer knew defendant as an area resident and could identify defendant and his companion on sight. Hollenbeck’s awareness that the informant correctly described defendant’s car and license plate is relevant, as is the officer’s knowledge that the Number Nine Game Room was not an unlikely destination for the teenagers described in the tip.
Developments that afternoon on Main Street served to further corroborate the informant’s story. The officers did not see defendant’s Camaro cross the river bridge, so they could not be sure that defendant had come across the bridge from Streator as predicted. However, the officers did observe defendant approaching from the direction of the bridge within five minutes of the time stated in the tip. In spite of the treacherous conditions that prevailed on area roads, the informant had accu*250rately specified a nearly precise arrival time. In addition, defendant traveled in his own car and with the friend that the informant described. Also as predicted, defendant proceeded north on Main Street and parked near the Game Room.
The informant had advised Hollenbeck that the LSD would be in a small container. As defendant alighted from his car, he clutched a small item that his closed hand nearly concealed. Hollenbeck, who saw something in defendant’s hand, was justifiably suspicious when defendant declared that he was holding nothing. Directly after this evasion, defendant attempted to remove his hand from Hollenbeck’s view. These events concededly do not establish guilt. However, when viewed in light of the other verified details, they do tend to confirm the crux of the tip, that defendant carried some LSD in a small package.
We conclude that, at this point, Hollenbeck had reasonable grounds to infer that defendant was committing a crime. His next act, that of arresting defendant, therefore comports with statutory and constitutional standards. Under these circumstances, the search incident to arrest and the seizure of the LSD tablets were also lawful.
The informant’s proven trustworthiness had been substantially reaffirmed during the moments preceding the arrest. Virtually every detail of the informant’s tip was confirmed prior to the arrest.
Defendant claims that the corroboration in this case means little because the officers only confirmed innocent activity on defendant’s part. He also contends that corroboration proves nothing about an informant’s basis of knowledge, an aspect of the instant tip about which we concededly have no direct information.
However, we are not persuaded that these considerations negate the existence of probable cause in this *251case. In People v. Gates, we relied on Whiteley v. Warden (1971), 401 U.S. 560, 567, 28 L. Ed. 2d 306, 312-13, 91 S. Ct. 1031, 1036, in stating that corroboration of innocent detail cannot support a finding of probable cause. (People v. Gates (1981), 85 Ill. 2d 376, 390.) However, we now note our agreement with Justice White, who stated in his Illinois v. Gates concurrence that the question is not whether the events observed by the police are innocent or incriminating. Instead, the proper focus is “whether the actions of the suspects, whatever their nature, give rise to an inference that the informant is credible and that he obtained his information in a reliable manner.” 462 U.S. 213, 269, 76 L. Ed. 2d 527, 568, 103 S. Ct. 2317, 2348 (White, J., concurring).
Turning next to defendant’s claim that corroboration cannot prove a proper basis of knowledge, we again reject defendant’s contention. In Spinelli v. United States, which endorsed the principle that corroboration could cure a tip that otherwise did not meet Aguilar requirements, the Supreme Court indicated that corroboration would not only establish an informant’s veracity, but also would support an inference that an informant obtained his story reliably. (Spinelli v. United States (1969), 393 U.S. 410, 417-18, 21 L. Ed. 2d 637, 644, 89 S. Ct. 584, 589-90.) This court in the past has viewed substantial corroboration as supportive of both prongs of the Aguilar test. (See People v. Winters (1983), 97 Ill. 2d 151, 161; People v. Dillon (1970), 44 Ill. 2d 482, 485-86.) We have previously noted that in Illinois v. Gates, the Supreme Court stated that, under the totality-of-circumstances analysis adopted in that case, a deficiency in one prong of the traditional test of an informant’s tip may be compensated for in determining the overall reliability of the tip by a showing as to the other. The court set forth a specific example by stating:
*252“If, for example, a particular informant is known for the unusual reliability of his predictions of certain types of criminal activities in a locality, his failure, in a particular case, to thoroughly set forth the basis of his knowledge surely should not serve as an absolute bar to a finding of probable cause based on his tip.” (Illinois v. Gates (1983), 462 U.S. 213, 233, 76 L. Ed. 2d 527, 545, 103 S. Ct. 2317, 2329.)
Defendant cites State v. Ruffin (La. Feb. 27, 1984), 35 Crim. L. Rep. (BNA) 2006, to support his claim that, where there is no information about an informant’s basis of knowledge, the tip cannot meet Illinois v. Gates probable-cause requirements, even when the informant is of proved reliability. In Ruffin, the Louisiana Supreme Court considered a tip from an informant of well-proved reliability. However, the informant had given no information about his basis of knowledge, and he had provided only a few details about the alleged illegal activity. Police detectives corroborated just one detail before arresting and searching the defendant. The Louisiana court, which found that probable cause had not been established, did not hold that corroboration could never operate to cure such a tip. Rather, the court explained that, “[wjithout further corroboration, we find no probable cause for the arrest when éxamining this tip under the totality of the circumstances.” (35 Crim. L. Rep. (BNA) 2006, 2007.) As such, we regard the Louisiana decision as consistent with the one we make in the case at bar. The facts of this case are easily distinguishable from those of Ruffin.
In our case, not only had the informant proved reliable in previous cases, but nearly every aspect of the information he supplied in the present case was corroborated. The balanced assessment of the informant’s tip in this case dictated by the holding in Illinois v. Gates causes us to conclude that the officer reasonably relied upon this information. The tip, in conjunction with the *253evasive conduct of the defendant when confronted by the officer, furnished probable cause to believe that he was engaged in unlawful conduct. The trial court therefore did not err in failing to suppress the evidence. We find that the appellate court erroneously reversed the defendant’s conviction.
For the above reasons, the judgment of the appellate court is reversed and the judgment of the circuit court of La Salle County is affirmed.
Appellate court reversed; circuit court affirmed.