[1] Defendant contends that the trial court erred in admitting evidence of the participation of a previously acquitted individual and refusing to admit evidence of his acquittal in the defendant’s conspiracy trial. We agree that the trial court erred in admitting evidence detailing the acquitted individual’s participation in the alleged conspiracy.
N.C. Gen. Stat. § 90-98 (1985) identifies the crime of conspiracy to commit an offense violating the North Carolina Controlled Substances Act. A criminal conspiracy is “an agreement between two or more people to do an unlawful act. . . .” State v. Bell, 311 N.C. 181, 316 S.E. 2d 611 (1984), State v. Worthington, 84 N.C. App. 150, 352 S.E. 2d 695, petition for review denied, 319 N.C. 677, 356 S.E. 2d 785 (1987). Because the crime requires more than one conspirator, a defendant cannot be convicted if his alleged co-conspirators were acquitted. State v. Raper, 204 N.C. 503, 168 S.E. 831 (1933).
Justice (later Chief Justice) Ruffin, writing for the North Carolina Supreme Court in State v. Tom, 13 N.C. 569 (December Term, 1828-1830), described the crime of conspiracy as “requiring the guilty cooperation of two, at least, to constitute it, in which there is a mutual dependence of the guilt of each person upon that of the other. . . .” (Emphasis added.) The essence of a conspiracy is the agreement with another to violate the law; when the alleged co-conspirator has been found not guilty of the crime there is no basis upon which to convict the remaining defendant. In the case at bar, Claude Enoch had been found not guilty of conspiracy to traffic in cocaine; therefore, his previous actions or statements relating to the alleged conspiracy could not be used to convict the defendant of conspiracy.
*477 [2] Defendant also assigns as error the trial court’s instruction to the jury that if they found that “Randolph Fryar knowingly possessed cocaine, and that the amount which [he] possessed was four hundred grams or more, it would be [their] duty to return a verdict of guilty of trafficking in cocaine.” Defendant contends that this instruction enabled the jury to find him guilty of trafficking at the highest level of punishment even if he did not know how much cocaine he possessed. We reject this contention; the evidence showed that he carried over 900 grams of cocaine and it was for the jury to decide whether this was a knowing possession. The trial court’s failure to include the modifier “knowingly” in the second clause of the instruction was not error.
[3] In another argument, the defendant contends he was entitled to a jury instruction on entrapment. A defendant is entitled to the instruction when the defense is supported by the evidence, viewed in the light most favorable to the defendant. State v. Jamerson, 64 N.C. App. 301, 307 S.E. 2d 436 (1983). Defendant told Ellerbe prior to their discussing the kilo purchase that he was already “in business with some Colombians who could produce any amount of cocaine.” The facts of this case do not show the degree of trickery or creation of the criminal design necessary to support the entrapment defense.
We likewise reject the defendant’s assignments of error regarding the admission of the telephone bill for Fryar’s Raleigh residence and the controlled substance itself. The record of long distance calls to Philadelphia was relevant to the proof of trafficking. The evidence relating to the packages of cocaine, furthermore, was sufficient to establish a clean chain of custody.
Defendant’s contention that he was denied a speedy trial fails because his filing of the request for voluntary discovery tolled the running of N.C. Gen. Stat. § 15A-701 (1983 & Supp. 1987). See State v. Marlow, 310 N.C. 507, 313 S.E. 2d 532 (1984).
We do not reach the defendant’s other assignments of error relating to his conspiracy conviction. We find no error with regard to his conviction for trafficking in cocaine by possessing and transporting over 400 grams of the substance, but because of the errors committed with regard to the conspiracy charge we hold that the defendant must receive a new trial on that charge.
*478The result is:
As to the trafficking convictions, Nos. 86CRS21281 and 86CRS21282,
No error.
As to the conspiracy conviction, No. 87CRS15321,
New trial.
Chief Judge Hedrick and Judge Arnold concur.