delivered the opinion of the court:
The State appeals the trial court’s order suppressing the evidence of cannabis found during a search under defendant’s sofa cushion. The issues on appeal are whether: (1) the police officer was permitted to enter defendant’s porch and house to determine whether someone inside was in need of emergency aid, following a 911 hang-up call; and (2) once inside, the police officer was justified in searching under defendant’s sofa cushion. We reverse and remand.
On July 25, 1995, defendant, Powell B. Greene, was charged with possession of not more than 2.5 grams of a substance containing cannabis (720 ILCS 550/4(a) (West 1994)). On November 13, 1995, defen*799dant filed a motion to suppress the evidence of the cannabis found during a search of his residence. On that same day, the trial court conducted a hearing on defendant’s motion.
Defendant testified that, on July 24, 1995, at about 11:15 p.m., he was watching television in his home when he heard a pounding at his front door. Defendant asked who it was, and they responded, "Police.” Defendant looked out and saw two male police officers standing on his front screened porch. In order to enter the screened porch, the officers had broken the eye hook that locked the door to the porch.
An officer told defendant that the police had received a 911 call. Defendant told the officers that he had mistakenly dialed 911 when he was attempting to dial area code 901. One of the officers asked if they could search defendant’s residence, but defendant refused to consent to the search. The officer kept talking about the 911 call and said that they wanted to check to see if anyone was harmed. Defendant finally told the officers to "just peep in the house, look in the house. There is no one here but me.” One officer walked through the house and then insisted that defendant get up from the couch. The officer reached under a pillow on the couch and found a small amount of marijuana. Defendant had not consented to the officer’s search under the pillow.
On cross-examination, defendant testified that there was no odor of cannabis in the house. He also testified that he did not hear the eye hook coming off the screen door or any banging at the screen door. Defendant also testified that he did not put anything under the pillow after the officer arrived at the front door. Defendant admitted that he had told the officer that there was nothing under the pillow and that the lady from 911 called back and that he had let the answering machine pick up the call.
The trial court took judicial notice of the fact that the area code for western Tennessee is 901.
Linda Harnish testified that she is a 911 dispatcher for Stephenson County and that, on July 24, 1995, she received a 911 hang-up call. The 911 system is an enhanced system, which shows the address, phone number, and the resident’s name when a call is received. The system also has the capacity to do an instant redial if there is a hang-up call. When the system redialed in the present case, defendant’s answering machine answered. The procedure for a hang-up call is immediately to make a "call” ticket and notify the proper police authority of the call. In the present case, the proper police authority was the Stephenson County sheriffs department. Har-nish notified the sheriffs department that there was a 911 hang-up call and that there was no response on redial.
*800On cross-examination, Harnish testified that it is standard operating procedure on all 911 hang-up calls to send an officer to verify that nothing is amiss at that location and that there is not an emergency.
Deputy Patrick McNamer testified that, on July 24, 1995, he was dispatched to go to 8 North Rose Street after a 911 hang-up call. All McNamer knew when he responded was that, after the hang-up, the dispatcher was connected with an answering machine on redial. Mc-Namer parked his vehicle in the street and walked to the front porch. There was neither any furniture nor any other objects on the front porch. The door leading into the house itself was closed. McNamer walked across the porch and knocked on the inner door. He looked in the window on the door and saw defendant watching television in the living room. Defendant came to the door and clicked the dead bolt lock. McNamer held a flashlight on himself to show defendant that he was a police officer. Defendant then walked back to the couch, lifted the cushion, and moved his hand as if he were putting something under the cushion. McNamer did not know whether it was a weapon or contraband.
While defendant was going back to the couch, McNamer knocked harder and said, "Sheriffs Department. Open the door.” Defendant returned to the door, unlocked and opened it. McNamer stepped into the doorway and told defendant that he was with the sheriffs department and that they had received a 911 call from defendant’s address. Defendant said that he had not called them. McNamer asked if there was anyone else in the house and defendant said that there was not. McNamer asked if they could search the house. Defendant sat down on a chair as he was asked to do, and Deputy Young, who was with McNamer, watched defendant. The house was small, and McNamer did not find anyone else in the house. McNamer again asked defendant if he had called 911 and, this time, defendant said that he may have dialed incorrectly when he was trying to call someone in Tennessee.
McNamer testified that, as he was walking through defendant’s home, he noticed a strong odor of burning marijuana. In his training and experience as a deputy, he had smelled marijuana in the past. McNamer believed that defendant had put marijuana under the cushion of the couch. McNamer asked defendant what was under the cushion, and defendant responded, "Nothing.” McNamer then lifted the cushion and found a small plastic bag which contained a green leafy substance.
On cross-examination, McNamer testified that there was a screen door on the porch. However, the screen door was unlocked. He also *801testified that it is the sheriffs department’s policy always to enter the premises after a 911 hang-up call.
The trial court held that the deputy had no right to enter defendant’s porch because there was neither probable cause nor exigent circumstances. Since the deputy had no right to be on the front porch, he had no right to look into defendant’s window and observe defendant putting something under the pillow. Therefore, the trial court granted defendant’s motion to suppress.
On January 30, 1996, the trial court denied the State’s motion to reconsider. In its order, the court stated,
"Deputy McNamer *** evidently unhooked the screen door to the screened-in porch ***.
*** McNamer could probably go to the door of the screened-in porch to attempt to raise occupants, but he had no right to unhook the door to the screened-in porch, or then to look through the door window in an attempt to observe illegal conduct.”
The State filed a timely certificate of substantial impairment and a timely notice of appeal.
As an initial matter, we note that we may reverse the trial court’s determination on a motion to suppress only where it is against the manifest weight of the evidence. People v. Paudel, 244 Ill. App. 3d 931, 940 (1993). The trial court’s function is to determine the witnesses’ credibility and weigh the testimony presented at the hearing. Paudel, 244 Ill. App. 3d at 940. We review questions of law, of course, de nova. People v. Krueger, 175 Ill. 2d 60, 64 (1996). After reviewing the record, we determine that the trial court’s factual findings are not against the manifest weight of the evidence. Thus, we consider the issues raised in this matter to be questions of law and, as such, review them de nova.
We next consider the State’s contention that the officers’ conduct was justified by exigent circumstances. The fourth amendment proscribes all unreasonable searches and seizures, and warrant-less searches of private residences are considered per se unreasonable unless a specifically established and well-defined exception applies. Paudel, 244 Ill. App. 3d at 939. In the absence of a warrant, exigent circumstances, or consent, the entry into a home is not an authorized act. People v. Swiercz, 104 Ill. App. 3d 733, 737 (1982).
We have recognized in the context of exigent circumstances that officers may make a warrantless entry into a home where the officers reasonably believe an emergency exists that mandates immediate action to aid persons or property within the home. People v. Speer, 184 Ill. App. 3d 730, 738 (1989). Therefore, the critical question is *802whether a 911 hang-up call with no answer on redial was sufficient for the officers reasonably to believe that an emergency existed within the home that required their assistance.
There is no simple test for determining the reasonableness of the belief that an emergency existed; however, all of the circumstances known to the police at the time of the entry must be considered. Speer, 184 Ill. App. 3d at 739. Moreover, we agree with Judge Burger’s comments in Wayne v. United States, 318 F.2d 205, 212 (D.C. Cir. 1963):
"[A] warrant is not required to break down a door to enter a burning home to rescue occupants or extinguish a fire, to prevent a shooting or to bring emergency aid to an injured person. The need to protect or preserve life or avoid serious injury is justification for what would be otherwise illegal absent an exigency or emergency. Fires or dead bodies are reported to police by cranks where no fires or bodies are to be found. Acting in response to reports of 'dead bodies,’ the police may find the 'bodies’ to be common drunks, diabetics in shock, or distressed cardiac patients. But the business of policemen and firemen is to act, not to speculate or meditate on whether the report is correct. People could well die in emergencies if police tried to act with the calm deliberation associated with the judicial process. Even the apparently dead often are saved by swift police response. A myriad of circumstances could fall within the terms 'exigent circumstances’ [citation], e.g., smoke coming out a window or under a door, the sound of gunfire in a house, threats from the inside to shoot through the door at police, reasonable grounds to believe an injured or seriously ill person is being held within.” (Emphasis in original.)
With the foregoing principles in mind, we first consider the officers’ entry of defendant’s screened porch. The trial court held that there were no exigent circumstances to justify the officers’ entry into the curtilage of defendant’s residence. We disagree.
Defendant possessed a lesser expectation of privacy in his porch than in his residence proper. People v. Arias, 179 Ill. App. 3d 890, 895 (1989). In Arias, the defendant was a suspect in a murder. Arias, 179 Ill. App. 3d at 892. Police officers went to the defendant’s home to ask him to accompany them to the police station. The officers walked up an outside staircase, opened and entered the porch door at the top of the stairs, and knocked on the door to the house. Arias, 179 Ill. App. 3d at 893. The defendant’s brother answered the door and let the officers in the house. The defendant accompanied the officers to the police station where he subsequently confessed. Arias, 179 Ill. App. 3d at 893-94. The trial judge suppressed the defendant’s confession and concluded that his constitutional rights were violated when *803the police entered the exterior door of the porch without a warrant, exigent circumstances, or consent. Arias, 179 Ill. App. 3d at 894-95. However, the appellate court reversed the suppression of the confession and held that the porch was not a living area and that the officers entered the porch merely to knock on the front door to the residence. Arias, 179 Ill. App. 3d at 895-96.
For the purpose of deciding whether the officers had a right to enter the screened porch, we find the facts and reasoning of Arias compelling. The record indicates that the screened porch was not a living area, that there was nothing on the porch, and that it was vacant when the officers arrived. The officers knocked on the screen door in an attempt to raise the occupant of the house. When they were unable to attract defendant’s attention, the trial court found that the officers made a peaceful, nonviolent entry onto the porch. In light of the fact that someone at defendant’s residence had made a 911 call and there was no answer when the 911 operator redialed the number, the officers were justified in making a peaceful entry onto the porch for the purpose of attempting to raise the occupant of the house. We emphasize that the officers’ entry was peaceful; this is not a case in which the officers broke down the door to the porch or house, and we decline to comment on such a situation as the determination of exigent circumstances depends on the totality of the evidence presented in the case at hand. Thus, we find that the officers’ belief that a potential emergency was justified and their entry onto defendant’s porch was proper.
We next consider the officers’ entry of defendant’s residence. The officers knocked on defendant’s front door, spotlighting themselves with their flashlights and calling out their identification. At that point, defendant locked the front door and returned to his couch, apparently hiding something under it. Deputy McNamer testified that this made him even more apprehensive; he had no way of knowing what the situation was in the house. When defendant finally opened the door, the record indicates that he initially denied making the call. We conclude that these peculiarities made it reasonable for the police to believe that someone within the house was attempting to call 911 for help but was prevented from completing the call. Accordingly, the officers’ entrance was justified by the exigent circumstances presented to them. If we were to adopt the rule urged by defendant, the police would never be authorized to enter and offer assistance in such a situation.
Moreover, it is apparent that defendant consented to the officers’ entrance into his residence. The trial court found that defendant consented to the officers’ entry in order to check on the well-being of *804any other occupants of the house. Defendant testified that he told the officers to "look in the house.” McNamer testified that defendant agreed to let him check to see if anyone else was in the house. Thus, even in the absence of the exigency, defendant consented to the search of the residence.
The final issue on appeal is whether, once inside, the police officer was justified in searching under defendant’s sofa cushion. The State argues that the search was justified by the police officer’s "plain view” observation of defendant placing something under the sofa cushion and the officer’s detection of the strong odor of burning marijuana.
The "plain view” doctrine allows police to search or seize evidence without a warrant if (1) the police officers’ initial intrusion is lawful or they are lawfully in an area where they can view the evidence to be searched or seized, and (2) it is immediately apparent that the items they observe may be evidence of a crime, contraband, or otherwise subject to seizure. Horton v. California, 496 U.S. 128, 136-37, 110 L. Ed. 2d 112, 123, 110 S. Ct. 2301, 2308 (1990). Moreover, Arizona v. Hicks, 480 U.S. 321, 326, 94 L. Ed. 2d 347, 355, 107 S. Ct. 1149, 1153 (1987), held that probable cause is required in order to invoke the "plain view” doctrine.
In the present case, defendant argues that the police officers were not lawfully on the porch when they made the "plain view” observation nor was it immediately apparent that the object defendant placed under the sofa cushion may have been evidence of a crime, contraband, or otherwise subject to seizure. We have already held that the officers were lawfully on defendant’s porch when they made the "plain view” observation. However, the remaining question is whether the "immediately apparent” requirement was met.
First, defendant argues that the court’s decision in People v. Williamson, 241 Ill. App. 3d 574 (1993), supports his argument that the object’s incriminating character was not immediately apparent. In Williamson, the court held that a police officer’s search of a prescription bottle was not justified under the "plain view” doctrine. 241 Ill. App. 3d at 580-81. The court noted that nothing about a prescription bottle is so unique that it would immediately suggest criminal activity. Williamson, 241 Ill. App. 3d at 583. In Williamson, the State failed to demonstrate any nexus between the bottle and any criminal activity or contraband since the use of the bottle was not unique to the illicit drug trade and such bottles could contain many innocent objects. 241 Ill. App. 3d at 583.
In the present case, unlike Williamson, the police officer’s detection of the odor of marijuana and his observation of defendant plac*805ing something under the sofa cushion constitute the nexus between the object searched and the contraband. Therefore, we conclude that Williamson does not preclude the search in the present case.
Next, defendant argues that the court in People v. Cohen, 146 Ill. App. 3d 618 (1986), held that an officer who smelled an odor of marijuana had not made a "plain view” observation. However, Cohen recognized the well-established rule that the detection of the odor of burnt cannabis by a trained police officer is a permissible method of establishing probable cause that the substance is present. Cohen, 146 Ill. App. 3d at 623. The Cohen court merely held that, where the officers had detected the odor on persons outside a home, the officers were not justified in conducting a general exploratory search of the remote areas of the home because they had no reason to believe controlled substances would be located there. Cohen, 146 Ill. App. 3d at 625. In the present case, unlike Cohen, defendant’s actions combined with the smell of the marijuana to give the officers a reason to believe that marijuana would be located under the sofa cushion.
Next, defendant argues that the search of the sofa cushion was impermissible because the exigency that justified the entry had passed when the police searched under the sofa cushion. Defendant cites Paudel, 244 Ill. App. 3d at 943, in which we noted that a warrantless search must be strictly circumscribed by the exigencies that justify its initiation. However, the Court in Hicks made it clear that it is only the primary search itself that must be strictly circumscribed by the exigencies that justify its initiation. Hicks, 480 U.S. at 325-26, 94 L. Ed. 2d at 354, 107 S. Ct. at 1153. The Court in Hicks explained that that lack of relationship always exists with police action validated under the "plain view” doctrine. Accordingly, Paudel does not preclude the search of objects in plain view provided the police have probable cause to believe that the search will reveal evidence of criminal activity.
Finally, defendant argues that the decision in Hicks still supports the suppression of the evidence because the Court upheld the suppression of the evidence there where the police searched an object (stereo equipment) that was not contraband per se and that was unrelated to the exigency that justified the initial entry. However, unlike the present case, the State in Hicks conceded that the police did not have probable cause to believe that the stereo equipment was evidence of a crime. Hicks, 480 U.S. at 326, 94 L. Ed. 2d at 355, 107 S. Ct. at 1153. It was the conceded lack of probable cause and not the fact that the object searched was unrelated to the initial entry which precluded the State in Hicks from invoking the "plain view” doctrine. In the present case, we agree with the State that the officer’s *806"plain view” observation of defendant placing the object under the sofa cushion and his trained ability to detect the odor of burnt cannabis gave the officer probable cause to believe that a search of the sofa cushion would reveal evidence of a crime.
Moreover, we note that, even if the "plain view” doctrine were inapplicable, the search in the present case could be upheld based on probable cause with exigent circumstances present that made it impractical to obtain a warrant. See Katz v. United States, 389 U.S. 347, 357, 19 L. Ed. 2d 576, 585, 88 S. Ct. 507, 514 (1967). In People v. Abney, 81 Ill. 2d 159, 169-71 (1980), our supreme court noted some exigent circumstances that may excuse the failure to obtain a warrant: (1) the recentness of the offense and the need for prompt action, such as under the hot-pursuit doctrine; (2) the absence of deliberate or unjustified delay by officers during which a warrant could have been obtained; or (3) an armed suspect who had exhibited signs of violence. Other factors that may suggest that the officer acted reasonably are (1) a clear showing of probable cause; (2) defendant was clearly identified; (3) the belief that defendant was on the premises; and (4) the entry was peaceful. Cohen, 146 Ill. App. 3d at 624.
In the present case, we believe that the circumstances demonstrate that an exigency was present. First, the recentness of the offense and the need for prompt action were demonstrated by the fact that the odor of burnt cannabis was still present. Although the potential destruction of evidence, standing alone, does not excuse obtaining a warrant (see People v. Ouellette, 78 Ill. 2d 511, 520 (1979)), it is one factor to consider. Second, the officers did not deliberately or unjustifiably delay during which time a warrant could have been obtained. Third, defendant’s movements indicated that the object under the pillow could have been a weapon. Fourth, the officers had probable cause to believe that a search of the sofa cushion would reveal evidence of a crime. Finally, the entry was peaceful.
We reverse the trial court’s order suppressing the evidence and remand this cause for further proceedings consistent with the views expressed herein.
Reversed and remanded.
COLWELL, J., concurs.