[1] Defendant contends the trial court erred in admitting into evidence certain out-of-court statements made by Nicky Taylor pursuant to N.C.R. Evid. 801(d)(E). He argues that the State failed to establish a prima facie case of conspiracy independent of these statements, and therefore the out-of-court statements are hearsay and inadmissible. We do not agree.
“One well-recognized exception to the general proscription against the introduction of hearsay evidence is that statements made by coconspirators during the course of and in furtherance of the conspiracy are admissible.” State v. Collins, 81 N.C. App. 346, 349, 344 S.E.2d 310, 313, appeal dismissed, 318 N.C. 418, 349 S.E.2d 601 (1986). There must be a showing that: “(1) a conspiracy existed; (2) the acts or declarations were made by a party to it and in pursuance of its objectives; and (3) while it was active, that is, after it was formed and before it ended.” State v. Conrad, 275 N.C. 342, 348, 168 S.E.2d 39, 43 (1969).
Because of the nature of a conspiracy, the State can seldom establish a prima facie case of conspiracy by extrinsic evidence before tendering the acts and declarations of the conspirators which link them to the crimes charged. Therefore, our courts often permit the State to offer the acts or declarations of a conspirator before the prima facie case of conspiracy is sufficiently established. Of course, the prosecution must properly prove the existence of the prima facie case of conspiracy before the close of the State’s evidence in order to have the benefit of these declarations and acts.
State v. Polk, 309 N.C. 559, 565-66, 308 S.E.2d 296, 299 (1983). “A conspiracy may be shown by a number of indefinite acts, which, taken individually, might be of little weight, but taken collectively *544point to its existence.” Collins, 81 N.C. App. at 350, 344 S.E.2d at 313-14. “The crime is established upon a showing of an agreement to do an unlawful act or to do a lawful act by unlawful means, whether or not overt acts occurred.” Id. at 350, 344 S.E.2d at 313.
“Ordinarily the factual issue of the existence or nonexistence of a conspiracy is for the jury.” Id. at 350, 344 S.E.2d at 314. “The State’s burden of proof here was only to procure evidence sufficient to permit, but not compel, the jury to find a conspiracy.” State v. Turner, 98 N.C. App. 442, 446, 391 S.E.2d 524, 526 (1990). “The evidence is considered in the light most favorable to the State.” Collins, 81 N.C. App. at 350, 344 S.E.2d at 314.
The State’s evidence tended to demonstrate that on 2 May 1989 defendant was parked on the side of a dirt road in a rural area at approximately 11:00 p.m. No houses or buildings were within .1 to .2 of a mile of this location. Taylor, who was accompanied by two undercover officers purchasing marijuana, pulled in behind defendant’s car and parked. Taylor left his car and spoke with defendant. Defendant gestured in a hitchhiking motion toward the side of the road between the two cars. Taylor then climbed a ditch embankment in the general area where defendant had indicated and retrieved a large bag containing fifteen pounds of marijuana. Defendant fled when the undercover officers attempted to arrest him. We believe that this evidence is sufficient to establish a prima facie conspiracy between Taylor and defendant. Therefore the trial court did not err in admitting Taylor’s out-of-court statements.
[2] Defendant next contends the trial court erred in denying his motion to dismiss the three charges for insufficient evidence. We are not persuaded by defendant’s arguments. When the trial court is ruling on a defendant’s motion to dismiss, the evidence must be considered in the light most favorable to the 'State, and the State is entitled to every reasonable inference which can be drawn from the evidence presented; all contradictions and discrepancies are resolved in the State’s favor. State v. Davis, 325 N.C. 693, 386 S.E.2d 187 (1989); State v. Abernathy, 295 N.C. 147, 244 S.E.2d 373 (1978). “If there is substantial evidence — whether direct, circumstantial, or both — to support a finding that the offense charged has been committed and that defendant committed it, a case for the jury is made and nonsuit should be denied.” State v. McKinney, 288 N.C. 113, 117, 215 S.E.2d 578, 582 (1975).
*545Two of the charges were conspiracy to sell in excess of one and one-half ounces of marijuana and conspiracy to deliver in excess of one and one-half ounces of marijuana. As discussed above, there was sufficient evidence to establish a prima facie case of conspiracy. This evidence, when coupled with Taylor’s statements that defendant was his supplier and viewed in the light most favorable to the State, constitutes substantial evidence of the two conspiracy charges.
The final charge was possession with intent to sell and deliver in excess of one and one-half ounces of marijuana. Defendant was not in actual possession of the marijuana. Proof of constructive possession in a prosecution for possession of contraband materials is sufficient and that possession need not always be exclusive. State v. Narcisse, 90 N.C. App. 414, 368 S.E.2d 654, disc. review denied, 323 N.C. 368, 373 S.E.2d 553 (1988). Constructive possession does not require actual possession of a thing, only that a person has the intent and capability to maintain control and dominion over that thing. State v. Beaver, 317 N.C. 643, 346 S.E.2d 476 (1986).
If the defendant has nonexclusive possession of the place where the marijuana was found, “the State must show other incriminating circumstances before constructive possession may be inferred.” Davis, 325 N.C. at 697, 386 S.E.2d at 190. Defendant was parked alone on the side of an isolated rural dirt road after 11:00 p.m. He conversed with an individual engaged in a drug transaction, pointed in the direction of where fifteen pounds of marijuana was located, and fled when police officers attempted to arrest him. Constructive possession may be inferred from these circumstances. After reviewing the evidence in the light most favorable to the State, we conclude that there was sufficient evidence to go to the jury.
[3] Defendant’s final contention is the trial court erred in admitting two of the State’s exhibits into evidence because of a failure to establish a chain of custody. Since there are no simple standards for determining the sufficiency of the chain of custody when authenticating real evidence, the trial court “possesses and must exercise a sound discretion in determining the standard of certainty required to show that the object offered is the same as the object involved in the incident giving rise to the trial and that the object is in an unchanged condition.” Abernathy, 295 N.C. at 161, 244 S.E.2d at 382.
*546“Where the articles objected to have been identified as being the same objects seized and in somewhat the same condition, as happened here, proving a continuous chain of custody is unnecessary.” State v. Hart, 66 N.C. App. 702, 704, 311 S.E.2d 630, 631 (1984). Two police officers identified the two bags containing the marijuana by their appearance and the attached evidence tags as being the same bags sent for chemical analysis. Each of the bags had a slit which had been sealed with a piece of tape containing an SBI chemist’s initials and case numbers. Small holes had been poked in the bags’ sides, but otherwise the bags and their contents were unchanged.
“[W]eak links in a chain of custody relate only to the weight to be given evidence and not to its admissibility.” State v. Campbell, 311 N.C. 386, 389, 317 S.E.2d 391, 392 (1984). The chemical analysis of the substance was not introduced into evidence due to the unavailability of the SBI chemist. Three officers testified that in their opinion the substance seized during the arrest was marijuana. In State v. Clark, 30 N.C. App. 253, 226 S.E.2d 398 (1976), it was recognized that a police officer’s experience and training may be competent to qualify him as an expert in identifying marijuana. We find no abuse of discretion by the trial court in admitting these exhibits.
No error.
Judges Johnson and Lewis concur.