William R. Drews and four other defendants were charged in an eleven-count superseding indictment. The indictment charged Drews with possession of amphetamine with intent to distribute (Count 7), distribution of amphetamine (Count 8), and conspiracy to distribute methamphetamine (Count 11) in violation of 21 U.S.C. §§ 841(a)(1), 841(b)(1)(B), and 846. 1 Drews was tried jointly with three of the other named defendants, and the jury found him guilty on all three counts. Drews appeals the district court’s 2 judgment entered on the jury verdict. We affirm.
I.
In early 1985, Drews moved from northwestern Iowa to Hawaii. Drews frequently returned to Iowa, however, to tend to the family farming business. The government’s theory at trial was that Drews also engaged in the distribution of controlled substances during these trips to Iowa.
The principal witness against Drews at trial was Pat Carstensen. Carstensen had earlier pleaded guilty to a charge of conspiracy to distribute methamphetamine and testified at trial pursuant to a plea agreement with the government. Carstensen testified that he, Drews, and Schoenfeld had met sometime in 1985 to discuss the distribution of methamphetamine, and that between March 1985 and January 21, 1987, he had purchased methamphetamine from Drews approximately five times. He also testified that Drews came to his home late on the night of January 6,1987, with a half pound of methamphetamine in his possession, and that Drews distributed two ounces of that quantity to him that night. Car-stensen testified that he in turn sold the substance to Sharon and J.D. Bloyer the next day, January 7, 1987. Sharon Bloyer was arrested the same day when she attempted to sell the substance to James Henderson, an undercover narcotics agent.
II.
Drews first argues that the district court erred in admitting into evidence the substance Bloyer attempted to sell to Henderson — 14.94 grams of amphetamine. He argues that because of inconsistencies in the evidence, the government failed to establish that the substance admitted into evidence was the same substance allegedly possessed and distributed by Drews on January 6, 1987.
We will reverse a district court’s ruling concerning the admissibility of evidence only upon a showing that a clear abuse of discretion has occurred.
United States v. Mays,
III.
Drews next contends that the district court erred in admitting into evidence Carstensen’s and Bloyer’s written plea agreements. In this circuit, a confederate’s guilty plea or plea agreement is admissible on the government’s direct examination of the witness as evidence of the witness’ credibility or of his acknowledgement of participation in the offense.
United States v. Braidlow,
[w]hile the existence of a plea agreement may support the witness’ credibility by showing his or her interest in testifying truthfully, the plea agreement may also impeach the witness’ credibility by showing his or her interest in testifying as the government wishes regardless of the truth. Introduction of the entire plea agreement permits the jury to consider fully the possible conflicting motivations underlying the witness’ testimony and, thus, enables the jury to more accurately assess the witness’ credibility.
United States v. Townsend,
Furthermore, the district court instructed the jurors to give Carstensen’s and Bloyer’s testimony such weight as they thought it deserved, taking into account whether the witnesses’ testimony may have been influenced by a desire to please the government. The court also instructed the jurors that the witnesses’ guilty pleas could be used only in determining what weight to give their testimony, not as evidence of the defendant’s guilt.
See Braidlow,
IV.
Drews next asserts that the district court erred in refusing to specifically instruct the jury that the testimony of an accomplice and testimony given pursuant to a plea bargain should be considered with greater care and caution than the testimony of an ordinary witness.
This court has held that “no ‘absolute and mandatory duty is imposed upon the court to advise the jury by instruction that they should consider the testimony of an uncorroborated accomplice with caution.’ ”
United States v. Shriver,
Furthermore, this court has held that a cautionary instruction is not required where additional evidence is presented that
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corroborates the accomplice’s testimony.
See United States v. McGinnis,
V.
Finally, Drews argues that the evidence was insufficient to convict him. In evaluating the sufficiency of the evidence supporting a jury verdict, we view the evidence in the light most favorable to the government, giving the government the benefit of all inferences that reasonably may be drawn from the evidence.
United States v. Kouba,
We affirm the district court’s judgment of guilty on all three counts.
Notes
. The indictment’s other counts are described in
United States v. Schoenfeld,
. The Honorable Donald E. O’Brien, Chief Judge, United States District Court for the Northern District of Iowa.
