A jury convicted José R. Andújar-Basco of conspiring and aiding and abetting the possession with intent to distribute five or more kilograms of cocaine. Andújar seeks a new trial, arguing that the district court erred by not declaring a mistrial (1) after a government witness testified regarding Andújar’s election to exercise his Fifth Amendment rights to remain silent and to request an attorney, and (2) after the government made unrelated improper remarks in closing arguments.
I.
Andújar was ensnared in a Drug Enforcement Agency (DEA) sting operation. In September 2004, the DEA paid a confidential informant to make purchases of controlled substances. At the behest of DEA Agents Carlos Galloza and Roberto Bryan, the confidential informant contacted Freddy Cancel-Camacho, an acquaintance he had known for twenty years, to inquire about the purchase of ten kilograms of cocaine. Prior to the purchase, the informant and Cancel met on multiple occasions and also had several telephone conversations. The DEA recorded many of these conversations and played them for the jury at trial.
On September 20, Cancel told the informant that the only person he knew who could acquire ten kilograms of cocaine was Andújar. The informant was also familiar with Andújar because Cancel had introduced the two a few years earlier. The next day, September 21, the informant went to Cancel’s house to discuss the transaction. While the informant was present with a recording device, Cancel talked to Andújar on the phone. Andújar confirmed that he would sell cocaine to the informant, but he lowered the quantity from ten kilograms to five kilograms and set the purchase price at $85,000. The three agreed to meet the next day to complete the transaction.
The September 22 meeting did not go as planned. When Andújar and Cancel did not arrive at the arranged meeting location at the appointed time, the informant left. While driving home, he received a call from Cancel on his mobile phone. At one point in the conversation, Andújar took the phone from Cancel and told the informant that he had the five kilograms and was ready to go forward with the deal. It was subsequently agreed that Andújar would give the cocaine to Cancel who would then give it to the informant and that Cancel *552 would thereafter bring the $85,000 from the informant to Andújar.
On the morning of September 23, Cancel called the informant and told him that Andújar had given him the cocaine. Cancel instructed the informant to come to his house to exchange the money for the cocaine. The informant and Agent Galloza, posing undercover as the drug buyer financing the purchase, drove to Cancel’s house. The informant went inside Cancel’s house, took possession of the bag of cocaine, and lead Cancel out to his truck to retrieve the money. After the informant put the cocaine in the back of the truck, local police and federal agents converged on the scene and arrested the informant, Cancel, and Agent Galloza. A forensic chemist testified that the substance seized that day was cocaine weighing just over five kilograms.
Cancel subsequently agreed to call An-dújar to arrange for Andújar’s payment. Eddie Vidal, a Puerto Rico police officer assigned to the DEA, recorded and listened to Cancel’s three phone conversations with Andújar. In those conversations, Andújar instructed Cancel to meet him at a shopping center parking lot. Cancel, Galloza, Vidal, and other law enforcement personnel drove to the shopping center and waited. Andújar arrived driving a white BMW with two passengers. After Andújar got out of the car and approached a fast food truck, Cancel identified him, and he was arrested. DEA agents also arrested the two other individuals in the white BMW, and conducted a search of the car’s interior. Under the driver’s seat the agents found a white plastic bag containing 110 individually wrapped clear plastic bags containing a white powdery substance. A forensic chemist testified that the bags contained approximately seventy grams of cocaine.
A grand jury returned a two-count indictment charging Andújar and Cancel with conspiring to possess with intent to distribute five or more kilograms of cocaine, see 21 U.S.C. §§ 841(a)(1) and 846, and aiding and abetting the possession with intent to distribute five or more kilograms of cocaine, see 21 U.S.C. § 841(a)(1) and 18 U.S.C. § 2. Cancel pled guilty to both charges before trial and was sentenced to seventy-eight months imprisonment. A five-day jury trial ensued on the charges against Andújar in which the government elicited testimony from the confidential informant, Officer Vidal, Agent Bryan, and two forensic chemists. The government also presented several recorded conversations, and testimony and documentary evidence concerning Andújar’s and Cancel’s phone records. The jury found Andújar guilty on both counts and the district court sentenced him to 121 months in prison. Andújar filed a timely notice of appeal.
II.
Andújar argues that two errors necessitate a new trial. First, he contends that the district court erred by not granting a mistrial after the government infringed his Fifth Amendment privilege against self-incrimination by eliciting testimony concerning his election to remain silent and to request an attorney while being questioned by DEA agents.
See
U.S. Const. amend. V (“No person shall ... be compelled in any criminal case to be a witness against himself ... ”);
Miranda v. Arizona,
A. Improper Testimony
We begin with Andújar’s contention that the government elicited improper testimony regarding his election to remain silent and to request an attorney. On the third day of the trial, the government called Agent Bryan who testified about Andújar’s arrest and booking. According to Bryan, Andújar was advised of his Miranda rights and indicated his understanding of those rights. Because Andújar did not initially invoke his right to silence, Bryan began questioning him. Bryan testified as follows concerning that interrogation:
Q. Can you tell the ladies and gentlemen of the jury what, if anything, the defendant told you?
A. Basically we explained the seriousness of the charge that he was looking at and advised him that you know, we have evidence regarding that, and trying to seek his cooperation regarding the next level.... At that time we tried to explain to Mr. Andújar the seriousness of the charges, and explain to him this was the particular time that ivas for him, to be beneficial for him to get on board, what we say, to go ahead and see if we could seek the person that he received the five kilograms of cocaine from.
Q. Did he tell you any information pertaining to any of the cocaine that you seized on that day?
A. Before we went straight to the five kilograms, what I initially started with was regarding the cocaine found in the vehicle. At that time he admitted to the fact that he said they, they had just purchased that particular cocaine.
Q. When he said they, who did you take they to be?
A. Himself and the other individuals in the vehicle.
Q. What happened after that?
A. In addition, as I tried to ascertain further information as far as who he actually received the cocaine from, he then changed the statement and said that it was his cocaine and no one else had anything to do with it.
Q. His cocaine being the five kilograms or the 70 grams?
A. At the time we were specifically talking about the cocaine in the vehicle. When attempting to go further or get further details regarding the five kilograms, and also where was the cocaine ascertained from, at that time he didn’t want to speak any further, he advised he wanted his lawyer and invoked his Miranda warnings and we stopped.
Q. Did you question him any further after that?
A. No, sir.
Day Three Tr. at 100-03 (emphasis added). Andújar did not object at any point during this line of questioning.
On the fourth day of the trial, the government recalled Agent Bryan to testify about a phone call DEA agents had made using Andújar’s mobile phone the evening after he was arrested. The following colloquy took place:
Q. Did Richard Andújar have his cellphone with him at the time?
*554 A. No, sir, we had it with us, sir.
Q. Did you have occasion to use his cellphone any time later in the night of September 23, 2004?
A. Yes, I did.
Q. Can you tell the ladies and gentlemen of the jury how you used his cellphone and for what purpose?
A. Yes, sir, after Mr. Andújar ivas arrested we were attempting to have Mr. Andújar basically what we call get on board> and in order to also keep the other cooperators cool at that particular time—
Day Four Tr. at 5 (emphasis added). At that point, Andújar objected to the testimony concerning “the other cooperators.” Andújar requested a mistrial, arguing that the government violated an earlier court order that government witnesses should refrain from suggesting that co-defendant Cancel had cooperated with law enforcement. 1 The court offered to instruct the jury that Cancel did not cooperate. Andú-jar then argued that Bryan’s testimony concerning the DEA’s attempt to get An-dújar “on board” “seems like ... he is making a comment on Mr. Andújar’s choice to remain silent.” The court did not “read that into this testimony” and denied Andújar’s request for a mistrial. The court nonetheless struck the testimony from the record.
At the start of the fifth and final day of trial, Andújar again moved, both orally and in a written submission, for a mistrial based on Bryan’s testimony that the DEA had attempted to get Andújar “on board.” Andújar noted that, although he had objected only once, Bryan had twice testified about the attempt to get Andújar “on board.” Andújar did not refer or object to the testimony describing Andújar’s termination of the interrogation. The court denied the motion for a mistrial but offered to deliver a curative instruction to the jury. Andújar objected to a specific instruction, which he feared would draw attention to the stricken testimony. Therefore, with the assent of both parties, the court simply delivered an instruction emphasizing that the jury could not consider any testimony that had been stricken from the record.
Andújar now challenges three portions of Bryan’s testimony: (1) the day three testimony about attempting to get Andújar “on board,” (2) the day three testimony regarding Andújar’s explicit invocation of his Fifth Amendment rights, and (3) the day four testimony again mentioning the attempt to get Andújar “on board.” We begin our analysis with consideration of the day three testimony specifically mentioning Andújar’s Miranda assertion.
Because Andújar did not raise a contemporaneous objection to this testimony, our review is for plain error only.
See United States v. Gabriele,
*555
The Fifth Amendment forbids the use of a defendant’s custodial silence as substantive evidence of his guilt.
Miranda,
The question that arises here is whether the rule announced in Miranda— that the government may not use the defendant’s post-arrest silence in its case-in-chief — is applicable here, where the defendant initially waived his Fifth Amendment privilege only to assert his right to silence at some later point in the midst of questioning. As a general rule, any inculpato-ry or exculpatory statements made by a defendant (including silence with regard to particular questions) are admissible at trial insofar as they were the product of a knowing and voluntary waiver.
2
See Miranda,
The government cites a line of Eighth Circuit cases that hold that testimony regarding a defendant’s refusal to speak to the police, following an initial
Miranda
waiver, is admissible against the defendant.
See United States v. Burns,
Andújar argues that his case is distinguishable from the above cases because the challenged testimony here refers directly to his express assertion of his constitutional rights. In the above cases, Andújar argues, the challenged testimony mentioned only the defendant’s refusal to answer further questions.
See Burns,
Andújar raises a meaningful distinction. It has long been established that a witness who has been compelled to testify may avoid a question on Fifth Amendment grounds only if the answer would pose “some authentic danger of incrimination.”
United States v. Castro,
More importantly, although
Miranda
acknowledges the possibility of a knowing and voluntary waiver, neither
Miranda,
nor any subsequent Supreme Court decision, draws a distinction between an immediate post-arrest Fifth Amendment assertion and a delayed mid-interrogation assertion. In either event, the assertion triggers the privilege, the police must cease interrogation, and the government may not use the assertion against the defendant at trial.
See Doyle,
Whatever the merit of the reasoning of the Eighth Circuit cases, there are limits to how far the government may go in describing the scope of an interrogation.
See Rowan,
The government argues, nevertheless, that in light of the Eighth Circuit cases, and a case from this circuit that favorably cites one of those cases,
see United States v. Lopez-Lopez,
It is important to emphasize that the Eighth Circuit cases did not confront the precise scenario presented here.
See supra
at 556. Neither did
Lopez-Lopez.
In that case, two co-defendants were questioned together and in response to a specific question, one co-defendant told the other “don’t answer.”
Lopez-Lopez,
In sum,
Miranda
draws no distinction between a mid-interrogation assertion of the privilege against self-incrimination and an immediate post-arrest assertion,
see Miranda,
Such a finding, however does not end the plain error analysis. Andújar must establish that the error affected his “substantial rights by altering the outcome of the trial.”
United States v. Shoup,
Although the government’s ease largely hinged on the testimony of a confidential informant, his testimony was corroborated by several sources, including the testimony of Officer Vidal and Agent Bryan, and the recorded conversations between the informant and Cancel. Bryan’s and Vidal’s testimony, and the substance of the recorded conversations, track the informant’s testimony. Moreover, Vidal personally identified Andújar as being on the other end of the calls Cancel made to set up the time and the place for the seller to receive payment for the five kilograms of cocaine. The phone records for Cancel’s and Andú-jar’s mobile phones — which show a number of calls between Cancel and Andújar during the time period of the conspiracy— further support the informant’s story.
The defendant’s own actions and statements provide further corroboration. An-dújar’s very arrival at the appointed time and place designated for the transfer of the $85,000 is strong circumstantial evidence of his involvement in the conspiracy, especially when viewed in context with the other evidence. Moreover, Andújar’s post-arrest confession that he was the owner of the seventy grams of cocaine found in the white BMW provides additional circumstantial evidence linking Andújar to the conspiracy. Both the quantity and the packaging of the seventy grams of cocaine, in 110 individual plastic bags, were consistent with distribution.
See United States v. Puckett,
Andújar argues that the credibility of the government’s identification is in doubt because the officers who arrested Andújar inquired whether other people at the scene were “Richard.” But the fact that the arresting officers may not have known what Andújar looked like hardly undermines the government’s case. Admittedly, the DEA relied on Cancel to make a visual identification of the seller, and he did just that. Andújar also argues that “the short duration of calls between Cancel and [Andújar], the lack of certainty as to what was spoken between them during those calls, [and] that there was evidence Cancel had direct communication with the owners of the narcotics whom he did not identify to the authorities at the time of arrest” further undermines the government’s ease. Again, however, it is not readily apparent how any of these factors weaken the government’s case. It is hardly surprising that a drug dealer would want to minimize the length of his phone conversations concerning an illicit transaction. Nor is the government charged with providing the precise contents of every conversation involved in a conspiracy. In any event, the detailed testimony of the confidential informant, and the testimony of Officer Vidal, *559 who listened in on three of Cancel’s calls with Andújar, could hardly be characterized as “uncertain.” Finally, that Cancel may have had contact with Andújar’s source does not disprove Andújar’s participation, especially in light of the testimony that the source trusted only Andújar and would not work directly with anyone else.
We therefore find that Andújar has failed to establish that the error “had [a] prejudicial impact on the jury’s deliberations.”
Ola no,
Andújar did, however, object to the day four testimony. Although not perceiving a problem, the district court sustained Andújar’s objection, struck the offending testimony from the record, and instructed the jury as requested by Andújar. Thus, the only question presented on appeal is whether the granting of greater relief (i.e., the declaration of a mistrial) was warranted. Although we ordinarily review de novo the question of whether “a statement in the presence of the jury infringed upon the privilege against self-incrimination,” we review the “denial of a motion for mistrial for abuse of discretion.”
Gabriele,
The connection between Bryan’s testimony about the DEA’s post-arrest “attempt! 1 to have Mr. Andújar ... get on board” and Andújar’s election to remain silent is tenuous at best. The question posed by the government — asking Bryan how and for what purpose he had used Andújar’s cell phone — did not call for such testimony. On its face, the testimony itself does not explicitly suggest that Andú-jar refused to talk to police, nor does it state whether the DEA’s “attempt” was ultimately successful.
See Lopez-Lopez,
Even assuming the jury made the connection Andújar fears, viewing the totality of the circumstances, we do not perceive a violation of constitutional magnitude. In a recent habeas case, we recognized that in cases involving testimony concerning a defendant’s
post-Miranda
silence, where the trial court promptly addresses the improper testimony “in an instruction to disregard and/or strike from the record, there may not necessarily be a
Doyle
violation because the government has not been permitted to ‘use’ the defendant’s silence against him.”
Ellen v. Brady,
The same factors are present here. The district court sustained Andújar’s objection and struck the offending testimony from the record. Following Andújar’s objection, no further questions or testimony alluded to his silence and the government made no comment on his silence in closing arguments. Additionally, the jury was instructed, both at the beginning of the trial and after the close of evidence, that it must not consider any testimony stricken from the record. Following closing arguments, the court, at Andújar’s request, again emphasized this point, reminding the jury “that any testimony that you may have seen or heard and that I have excluded from evidence, and instructed you to disregard, is not evidence.” The court also instructed the jury that Andújar has a “constitutional right not to testify and no inference of guilt or of anything else, may be drawn from the fact that he did not testify. For any of you to draw such an inference would be wrong, indeed it would be a violation of your oath as a juror.” Andújar presents no sound reason to discard “the customary presumption that juries follow their instructions.”
Gabriele,
Andújar argues that we should view the challenged day four testimony in context with the previous improper testimony. Andújar argues that the government purposefully elicited Bryan’s improper testimony and the district court should have considered the cumulative effect of all the improper testimony. First, as noted above, we disagree that the government purposefully sought to elicit testimony about Andújar exercising his Fifth Amendment privilege. Additionally, it bears emphasizing that this court reviews alleged errors of the district court, not errors of the prosecution, and the district court is not charged with advocating for the defense or anticipating issues not brought to the fore by counsel.
Cf. United States v. McIntosh,
B. Improper Closing Arguments
Andújar challenges three comments made by the government in closing arguments. First, at the end of his initial summation, the prosecutor stated, “I feel comfortable and the United States feels comfortable that they have proven beyond a reasonable doubt that this man delivered five kilograms of cocaine between the 20 and 23 of September.” Day Five Tr. at 39. In rebuttal, the prosecutor argued, inter alia, that Andújar and Cancel “conspired to distribute five kilograms of cocaine, it does not matter where it came from. He gave it to Freddy Cancel. That is what *561 matters. I have proven it, absolutely. We have met our burden.” Id. at 59. Finally, in his last words to the jury, the prosecutor urged, “[y]ou find him guilty, you uphold the law, your duty as jurors, make the logical choice and come back with one answer, and telling this man, Richard Andú-jar you are guilty. Thank you.” Id. at 67.
Andújar argues that the first two remarks were improper because they amounted to “affirmations of [the prosecutor’s] personal belief’ that Andújar is guilty.
See United States v. Gonzalez Vargas,
Since Andújar did not object to the prosecutor’s remarks at trial, we may only review for plain error.
See United States v. Henderson,
III.
For the foregoing reasons, the defendant’s convictions are affirmed.
Notes
. Citing Federal Rule of Evidence 403, the court had ruled that any testimony referring to co-defendant Cancel's “cooperation” with law enforcement was overly prejudicial and misleading because Cancel ultimately chose not to cooperate and not to testify at Andú-jar's trial. The government was ordered to instruct its witnesses not to characterize Cancel as a “cooperator.”
. Andújar does not argue that his waiver was not made knowingly and voluntarily.
. We recognize that, unlike in
Ellen,
some testimony concerning Andújar’s silence was ultimately submitted to the jury. But this state of affairs came about only because of defense counsel's inattention. Once apprised of the problem, the district court acted promptly and reasonably to correct it. We further add that, even under the stricter form of harmless error review applicable to constitutional errors, the government has established beyond any reasonable doubt that the verdict was not influenced by the references to Andújar’s
Miranda
election.
United States v. Coker,
. The government also argues that Andújar's counsel interjected her own personal opinion in her summation and thereby "neutralizad] the harm flowing from the prosecutor's remarks."
United States v. Gallagher,
. Although the lack of prejudice saves the government from a lost conviction, we are troubled that such improper arguments persist despite our repeated admonitions against them.
See, e.g., United States v. Martinez-Medina,
