Van Nguyen and Nam Nguyen 2 wеre indicted together and separately tried for and convicted of conspiracy to distribute and possess with the intent to distribute ecstasy in violation of 21 U.S.C. §§ 841(b)(1)(C) and 846. Van Nguyen appeals his conviction and sentence and Nam Nguyen appeals only his sentence. We affirm Van Nguyen’s conviction and both of the district court’s 3 sentences.
I
Van Nguyen was arrested on December 20, 2006, when he arrived in Minnesota to deliver 12,000 ecstasy pills he had arranged to sell tо a Federal Bureau of Investigation (FBI) informant. Van was charged in the District of Minnesota with conspiring with a local courier to distribute and possess with intent to distribute the 12,000 pills in his possession at the time of his arrest. He cooperated with authorities at first and confessed to selling 10,000 pills on one occasion and 5,000 pills on another to someone named “Nam” (later determined to be the other appellant, Nam Nguyen) in Iowa. Van admitted he wаs going to send 10,000 of the 12,000 pills in his possession to Iowa. A text message on Van’s phone alerted authorities that he planned to meet Nam in Davenport, Iowa. At the direction of FBI agents, Van called Nam and had a recorded conversation with him about the meeting. Van then refused to cooperate further with the government and pleaded guilty, on May 11, 2007, to conspiracy to distribute and possess with intent to distribute the 12,000 ecstasy pills.
*373 II
Subsequently, during a 2007 investigation into a Davenport area ecstasy distribution ring, an informant told Drug Enforcement Agency (DEA) agents about a 10,000 pill drug deal involving Nam and an unknown supplier, who later turned out to be Van, in Minnesota in Fall of 2006. FBI agents then gave the DEA agents the information gathered during their investigation of Van in Minnesota, including the recorded call between Van and Nam, and Van’s confession that he had supplied Nam with ecstasy pills on two previous occasions аnd that he intended to send 10,000 of the 12,000 ecstasy pills in his possession at the time of arrest to Nam in Iowa.
The government charged Van Nguyen and Nam Nguyen in the Southern District of Iowa with conspiracy to distribute and to possess with intent to distribute ecstasy. The defendants were tried separately, a few days apart. Van filed a motion to dismiss, arguing the charges were a breach of his plea agreement in the Minnesota case, and venue was not prоper in Iowa because his participation in the conspiracy took place in Minnesota. The district court denied the motion. During trial, Van brought a motion to suppress his statements made to FBI agents on the third day he was in custody, because agents did not repeat the Miranda warnings to him that day. The district court denied the motion. Van also filed a motion in limine in the Iowa trial, seeking to exclude evidence of his arrest and prosecution in Minnеsota. The Government agreed not to present all the evidence related to his arrest and conviction and stated it would present only evidence relevant to the Iowa conspiracy. The district court ruled the evidence was admissible and could be used at trial. However, the court instructed the jury it was not to consider the earlier conspiracy conviction as proof of guilt for the charged conspiracy but only as evidence that Van knew the purpose of the charged conspiracy.
The jury convicted Van Nguyen after finding that venue was proper in the Southern District of Iowa. The district court sentenced Van to 210 months of imprisonment. Nam Nguyen was also convicted and was sentenced to 188 months of imprisonment. These appeals followed.
Ill
Van Nguyen argues the prosecution in Iowa was a breach of the Government’s promises in his plea agreement in the Minnesota case. Interpretation of a plea agreement is an issue this court reviews
de novo. United States v. Paton,
The plea agreement references only the twenty-day conspiracy between Van Nguyen and a courier to effect the 12,000-pill Minneapolis transaction. The Iowa case involved a five-month conspiracy to commit multiple acts. Van argues there was an implied promise to sentence him for all drug transactions known to the government at the time of the Minneapolis plea deal and the government was therefore precluded from pursuing separate charges based on any information in its possession at the time of the deal. Van does not cite to authority for that proposition. The plea agreement does not contain an agreement not to prosecute other offenses. In
United States v. Peck,
IV
Van Nguyen next claims the jury
4
wrongly determined that venue was appropriate in Iowa. Where the relevant facts are disputed, venue is a question of fact for the jury to decide.
United States v. Bascope-Zurita,
V
Van Nguyen argues the district court erred when it denied his motion to suppress evidence based on a claimed violation of his rights under
Miranda v. Arizona,
The determination of whether a defendant has knowingly and voluntarily waived his
Miranda
rights is an extremely fact sensitive analysis.
United States v. Boyd,
This court has not considered circumstances involving a time lapse of a full day between a
Miranda
warning and subsequent interrogation but the Third Circuit found, in
United States v. Pruden,
Van Nguyen is an immigrant whose command of the English language is debatable. However, the interviews in question were conducted by a Vietnamese-speaking agent. Van has extensive experience with the criminal justice system. He was given the full Miranda warnings in his first interview. Van takes issue with an FBI agent’s testimony that the agent gave Van the full Miranda warnings again at his second interview but all parties agree that Van was at least reminded of his rights at that time. The officers reminded Van of his rights before questioning him at the third interview on day three. Van acknowledged both times that he remembered and understood his rights. Van was transferred frоm the police department where he was initially interviewed, to the county jail where he was interviewed on the second day, to the FBI offices where the final interview took place. However, all of the interrogations were conducted by the same-team of agents. Under these circumstances, we cannot say it was clear error for the district court to find that Van Nguyen had knowingly and voluntarily waived his rights and, as a result, the district court did nоt err when it denied the motion to suppress.
VI
Van Nguyen made an oral request for substitution of counsel at the close of the motions hearing thirteen days before trial and he argues the district court abused its discretion in denying that request. We review the denial of a motion for substitute counsel for abuse of discretion.
United States v. Grady,
VII
Van also сhallenges the sufficiency of the evidence supporting his conviction. This court reviews the sufficiency of the evidence
de novo,
viewing the evidence in the light most favorable to the government, resolving all conflicts in the government’s favor, and accepting all reasonable inferences that support the verdict.
United States v. Scofield,
In order to convict Van Nguyen of conspiracy to distribute and to possess with intent to distribute ecstasy, the government was required to prove 1) a conspiracy to distribute drugs existed; 2) Van knew of the conspiracy; and 3) he intentionally joined the conspiracy.
United States v. Nolen,
VIII
Van Nguyen filed a motion in limine to exclude evidence of the 12,000-pill transaction in Minnesota on the grounds that it violated Fed.R.Evid. 403. He argues that it also violated Rule 404(b). We review the district court’s decision to admit evidence for abuse of discretion.
United States v. Valencia,
Rule 403 provides that relevant evidence mаy be excluded if its probative value is substantially outweighed by the danger of unfair prejudice. “We give great deference to a district court’s application of the Rule 403 balancing test.”
United States v. Lupino,
The district court limited the admissible evidence of the Minnesota transaction to facts necessary to give context to the evidence gathered during that arrest. Quite a bit of evidence directly relevant to the *377 Iowa conspiracy was collected during the Minnesota arrest, including Van’s phone call to Nam regarding a prospective drug deal in Iowa, the text messages with Nam, and Van’s admissions regarding a number of drug transactions, including his admission that some of the drugs he conspired to possess in Minnesota were going to be passed on to the Iowa conspiracy members. The prosecutor twice admonished the jury not to consider the evidence for improper purposes. In light of fact that much of the evidence surrounding the Minnesota transaction was direct evidence of the conspiracy charged in the instant case, and taking into account the limited nature of the evidence, the district court did not abuse its discretion when it admitted the evidence.
The government argues the limited evidence admitted was inextricably intertwined with the evidence of the conspiracy and was therefore not subject to rule 404(b).
See United States v. Adams,
IX
Van Nguyen argues the district court improperly calculated his base offense level because it used the wrong weight for the ecstasy pills attributable to him. We review the district court’s determination of drug quantity for clear error.
United States v. Gomez-Perez,
At sentencing, the district court used the default weight of 250mg suggested in the Guidelines because there was testimony that the рills Van was selling varied in color and potency. United States Sentencing Guidelines Manual § 2D1.1, comment, n. 11 directs a district court to use the Typical Weight Per Unit Table (from which the 250mg weight was taken) unless “any more reliable estimate of the total weight is available from case-specific information.” In light of the evidence that the instant conspiracy involved a variety of pills, many of which were not available for chemical analysis, it was not еrror for the district court to use the Typical Weight Per Unit Table.
*378 X
Van Nguyen argues the district court imposed an unreasonable sentence. Van’s sentence was within the guidelines range and we presume on appeal that the sentence was reasonable.
See Rita v. United States,
XI
Nam Nguyen attacks his sentence, arguing the district court improperly denied him U.S.S.G. § 501.2(a)(5) safety valve relief. We review a district court’s findings as to the completeness of a defendant’s safety valve proffer for clear error.
United States v. Rojas-Coria,
The district court found that Nam Nguyen’s safety valve statement was not credible and did not represent a truthful account of his involvement. We accord great deference to a district court’s credibility determination.
United States v. Crumley,
XII
Nam Nguyen also argues the district court attributed the wrong quantity of drugs to him and miscalculated his base offense level as a result. We review the district court’s determination of drug quantity for clear error.
Gomez-Perez,
[DEFENSE COUNSEL]: We would therefore argue that applying either the *379 250 milligrams or the 341 milligrams of some other drug that was tested up in Minnesota, either way you calculate it, 30,000 pills versus the 46 that the government has now adopted as the true amount, it comes to a 34 offense level and with a two-level downward departure for safety valve, that would put his offense level at 32.
THE COURT: He got an adjustment for obstruction of justice.
[DEFENSE COUNSEL]: Correct. I’m sorry. It would — I forgot about that. In essence it would' — one would negate the other so he’d be a level 34.
He has therefore waived the argument on appeal.
See United States v. White,
In addition, Nam’s only argument on this score is the district court improperly relied on the testimony of witnesses who were not credible and disregarded Nam’s testimony. As discussed above, the district court found Nam not credible. In addition, if the district court abused its discretion in relying on other witnesses, Nam still loses on this issue because he admitted to facts in his safety valve statement that would support the attribution to him of more pills than were taken into account for his sentencing.
For the foregoing reasons, we affirm the judgment of the district court in both cases.
Notes
. Since the defendants share a last name, we will sometimes refer to them by their first names for clarity.
. The Honorable Jоhn A. Jarvey, United States District Judge for the Southern District of Iowa.
. Van Nguyen asked this court to review the question of whether the entire jury pool was tainted because one juror, who was stricken for cause, made the comment, "I was in Vietnam, but I don't really like the idea of them being here in the United States.” We have reviewed the record pursuant to
Penson v. Ohio,
