The appellant, Michael Ray Tolliver, was convicted in a jury trial of conspiring to possess with intent to distribute cocaine, in violation of 21 U.S.C. § 841(a)(1) and 21 U.S.C. § 846, and of possession with intent to distribute cocaine, in violation of 21 U.S.C. § 841(a)(1) and 18 U.S.C. § 2. Several issues, properly preserved for appeal, are raised here.
First, the appellant challenges the sufficiency of the evidence. The testimony of DEA Agent Everrett Elledge was presented by the government to show Tolliver’s membership in the conspiracy and possession of the cocaine, but Tolliver contends that that testimony was not credible. He notes that the testimony of other participants in the crime was in direct conflict with that of Elledge and that some of El-ledge’s testimony was impeached.
This court may not assess the relative credibility of trial witnesses; that function is reserved for the trier of fact.
United States v. Parker,
After reviewing the evidence, we have determined that the testimony by Agent Elledge was substantial enough to support the appellant’s conviction on the conspiracy count as well as on the substantive offense. 1 That determination satisfies our inquiry into sufficiency.
The appellant next contends that evidence should have been suppressed at his trial because it was obtained as the result of an arrest which he asserts involved an unannounced entry in violation of 18 U.S.C. § 3109. 2 Agent Elledge had met with Tol-liver and his co-defendants inside the appellant’s apartment, then went outside to the parking lot with one of the co-defendants, ostensibly to get money to consummate the deal which the group had discussed. The apartment door was closed and locked after the two had left. Two of appellant’s co-defendants, who were already outside, were then arrested by Elledge and other agents. The agents, with guns drawn, returned to the apartment along with one co-defendant. The co-defendant knocked on the door as directed, and the door was opened slightly by a person inside. The door was pushed in and all parties entered the apartment. Pri- or to the entry, there was no announcement by the agents of their identity or purpose.
*1008
Since the door to the apartment was not fully opened by an occupant, the force used by the agents to gain admittance invoked § 3109.
See United States
v.
Seelig,
Finally, appellant Tolliver contends that the trial court so restricted the cross-examination of Agent Elledge that he was denied his sixth amendment right to examine hostile witnesses. During that cross-examination, counsel for the appellant attempted to elicit testimony to establish that a confidential informant employed by the DEA had filed an internal complaint which had alleged that Elledge had kept confiscated drugs, threatened defendants, and testified falsely regarding certain drug investigations. However, the court sustained the government’s objection when defense counsel was unable to produce evidence that such a complaint had in fact been filed, or that there was any basis, in fact, for the line of questioning.
The extent of cross-examination with respect to an appropriate subject of inquiry is generally within the sound discretion of the trial court,
Alford v. United States,
Here the court did not absolutely restrict the cross-examination; it gave the defense counsel the opportunity to proffer some basis in fact for the allegations. The appellant’s sixth amendment right was not violated, for without a factual showing, the decision to limit cross-examination was. within the realm of the court’s discretion.
Cf. Casey
v.
United States,
The decision of the district court is
AFFIRMED.
Notes
. The evidence regarding Tolliver’s participation in the conspiracy was largely circumstantial, but criminal conspiracy may adequately be established on circumstantial evidence.
E. g., United States v. Ayala,
. The “knock and announce” requirements of § 3109 have been held applicable to entries made to effect warrantless arrests.
Miller v. United States,
.' This entry might have been justified under the continuing ruse exception. Had Agent Elledge simply led the others back into the apartment, reentry would have depended on Elledge’s ruse as a narcotics purchaser and clearly would have been “part of a single integral transaction that was still in the process of being completed.”
United States v. Dohm,
