A jury convicted Daniel Patrick Hogan of conspiracy to distribute meth, possession with intent to distribute meth, and distribution of meth, all in violation of 21 U.S.C. § 841(a)(1). Hogan appeals, asserting that the district court 1 erred in denying his motions to suppress and for acquittal, and in sentencing him to 188 months’ imprisonment. Having jurisdiction under 28 U.S.C. § 1291, this court affirms.
I.
On May 2, 2004, an Oklahoma trooper stopped a vehicle after the driver (Hogan) committed a lane change violation. As the trooper approached the vehicle, Hogan moved around, bending repeatedly. Patting down Hogan, the trooper noticed that he was unusually warm, shaky, sweaty, and fidgety. Hogan told the trooper that he planned to be in Branson, Missouri, within an hour, which was impossible.
The trooper suspected that Hogan was under the influence of meth, and summoned his partner, who had a drug detection dog. The dog alerted to two areas of the vehicle. The trooper and his partner asked Hogan if there were drugs in the vehicle; Hogan replied there was marijua *920 na. The troopers searched the vehicle and found about 314.3 grams of meth and a smaller quantity of marijuana. The partner then attempted to convince Hogan to make a controlled delivery of the meth. Hogan refused. The troopers arrested Hogan, and read the Miranda warnings.
In September 2004, federal agents intercepted a UPS package containing about 130.8 grams of meth. A controlled delivery of the package was made to its intended recipient, who then delivered the meth to Phil Myers. The agents arrested Myers, who said he had, at Hogan’s instruction, received the package and wired money to California. Myers confirmed his involvement with Hogan by playing several voice mail messages from Hogan.
On October 17, 2004, Officer Robert Curtis arranged for Myers to make a controlled buy of meth from Hogan at his trailer. Myers wore a recording device; officers listened to the entire transaction. The conversation between Myers and Hogan indicated additional meth in the home. Myers purchased about 10.5 grams of meth.
Shortly after Myers left, Officer Curtis and another officer approached the trailer, wearing police vests, to conduct a “knock and talk.” A man on the porch made eye contact with Officer Curtis, and then turned and ran inside. Concerned about their safety and possible destruction of evidence, the officers chased him into the trailer and detained the people inside, which included Hogan. The officers conducted a protective sweep of the premises, which did not reveal weapons. Officer Curtis informed Hogan of his Miranda rights. Hogan signed a consent form to search the trailer, and a Miranda waiver. In the subsequent search, officers found meth (about 80.3 grams) and a digital scale. Hogan told officers that he had sent the UPS package, fronted drugs to some of his customers, and since May 2004, traveled to California at least 15 times to retrieve drugs (about 2.5 pounds of meth).
On October 19, 2004, officers interviewed Hogan, after again advising him of his rights. Hogan admitted transporting meth from California since 2003. He also produced a chart detailing the pattern of distribution. It showed his source, and listed him as the source for other dealers.
Hogan moved to suppress the evidence obtained during the May 2 traffic stop and October 17 trader search. After an evi-dentiary hearing, a magistrate judge denied both motions, and the district court adopted its report and recommendation.
While Hogan was in pretrial custody, the jail placed him in monitored segregation because of threats to the jail captain. Under jail policy, Hogan’s personal items were collected from his cell. In addition to jail personnel, Officer Curtis was allowed to review Hogan’s documents for further threats. Officer Curtis discovered statements about drug dealings. Hogan unsuccessfully moved to suppress this evidence.
At trial, the government introduced testimony by the officers involved in the stop and Officer Curtis, testimony by two of Hogan’s co-conspirators (including Myers), a recording of the controlled buy, the papers seized from Hogan while in jail, a video tape of one of Hogan’s road trips to California, and various physical evidence. At the close of the government’s case, Hogan moved for a judgment of acquittal, which was denied. The jury found him guilty, and the district court sentenced him to 188 months’ imprisonment. Hogan appeals.
II.
Hogan appeals the denial of his motions to suppress evidence gathered
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during the traffic stop, and the searches of his trailer and jail cell. This court reviews “the district court’s factual determinations in support of its denial of a motion to suppress for clear error and its legal conclusions de novo.”
United States v. Harper,
A.
Hogan first contends that the district court erred in denying his motion to suppress the drugs and statements obtained during the traffic stop. He claims the marijuana and meth should have been excluded because the search exceeded the scope of the stop.
Hogan’s lane-change violation provided probable cause to initiate the traffic stop.
See United States v. Luna,
Hogan also maintains that his
pre-Mi-randa
statements should have been excluded because they were the result of a custodial interrogation.
See Dickerson v. United States,
Miranda
defines custodial interrogation as “questioning initiated by law enforcement officers after a person has been taken into custody or otherwise deprived of his freedom of action in any significant way.”
Miranda v. Arizona,
The error in admitting the two statements may be harmless.
See Chavez v. Weber,
B.
Hogan next argues that the district court erred in denying his motion to suppress the evidence and statements obtained during the warrantless search of the trailer. In accordance with the Fourth Amendment, “a warrantless search of a home must be supported by consent or probable cause and exigent circumstances.”
United States v. Poe,
Hogan claims that the district court erred in finding exigent circumstances. Shortly before officers approached the trailer, they listened to a transaction where Hogan sold meth to Myers, implying that he had more meth in the trailer. Then, approaching the trailer to conduct a “knock and talk,” the officers observed a man make eye contact, and then turn and flee. In these circumstances, it was reasonable for the officers to be concerned about their safety and the possible destruction of evidence.
See Ball,
C.
Hogan appeals the denial of his motion to suppress the papers seized from his jail cell, arguing that the seizure and use at trial violated the Fourth and Fifth Amendments. He alleges that this purported constitutional violation was so egregious that the case should have been dismissed with prejudice, or Officer Curtis should have been prevented from testifying.
Hogan contends that the warrant-less search of his cell violated the Fourth Amendment. The Supreme Court has held that
society is not prepared to recognize as legitimate any subjective expectation of privacy that a prisoner might have in his prison cell and that, accordingly, the Fourth Amendment proscription against unreasonable searches does not apply within the confines of the prison cell. The recognition of privacy rights for prisoners in their individual cells simply cannot be reconciled with the concept of incarceration and the needs and objectives of penal institutions.
Hudson v. Palmer,
Hogan also maintains that the introduction of the papers at trial violated the Fifth Amendment because it effectively forced him to testify against himself. The Fifth Amendment provides: “No person shall be ... compelled in any criminal case to be a witness against himself....” U.S. Const, amend. V. “The core protection afforded by the Fifth Amendment is a prohibition on compelling a criminal defendant to testify against himself at trial.”
United States v. Frazier,
III.
Hogan appeals the denial of his motion for judgment of acquittal, challenging the sufficiency of the evidence. This court reviews de novo the sufficiency of the evidence supporting a judgment.
United States v. Castro-Gaxiola,
Hogan first challenges the sufficiency of the evidence regarding conspiracy to distribute meth. “To prove conspiracy, the Government must show an agreement to achieve an illegal purpose, the defendant’s knowledge of the agreement, and the defendant’s knowing participation in the conspiracy.”
Castro-Gaxiola,
Hogan contends that the government failed to prove the existence of an agreement, instead showing only that he possessed meth twice and sold it once. He focuses on the lack of evidence that he benefited or profited from the alleged conspiracy. To the contrary, Hogan admitted fronting meth to other dealers, expecting payment only when they resold the drugs. He admitted, and other witnesses and evidence confirmed, that he frequently traveled to California to transport meth to Missouri. He produced a chart, outlining the pattern of distribution of meth from his source in California through himself to four other dealers. He admitted, and Myers confirmed, that he sent a UPS package with meth to Missouri. This is sufficient evidence of an agreement to distribute meth. See id. at 792-94.
Hogan also challenges the sufficiency of the evidence regarding possession of meth with intent to distribute, and distribution of meth. He claims that the jury instructions and verdicts failed to allege dates and locations — essential elements of the offenses. However, “[t]ime is not a material element of a criminal offense unless made so by the statute creating it.”
United States v. Youngman,
There was sufficient evidence for a reasonable jury, drawing all reasonable infer-enees, to convict Hogan of all three charges.
IV.
Hogan asserts two sentencing errors. First, that the district court erred in determining that his relevant conduct involved conspiring to distribute more than 500 grams of meth, resulting in a base offense level of 36.
See
U.S.S.G. § 2Dl.l(c)(2). This court reviews “the district court’s interpretation of the guidelines de novo, and the court’s relevant conduct determination for clear error.”
United States v. Allebach,
Hogan also maintains that the district court erred in refusing to reduce his base offense level. Under U.S.S.G. § 3B1.2, a sentencing court may decrease the offense level by four if “the defendant was a minimal participant in any criminal activity.” This section, intended to be used “infrequently,” covers “defendants who are plainly among the least culpable of those involved in the conduct of a group” and who “lack [ ] knowledge or understanding of the scope and structure
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of the enterprise and of the activities of others.”
See
U.S.S.G. § 3B1.2, cmt. n. 4. The defendant bears the burden of proving a reduction is warranted.
See United States v. Whiting,
Hogan argues that he was a minimal participant because the government’s evidence established,, only isolated incidents, not that he had control over or profited from the operations. To the contrary, the evidence established that Hogan regularly transported meth from California to Missouri, actively sold meth and fronted it to other dealers, and instructed others to receive a shipment of meth. The fact that he could draw a chart detailing the pattern of distribution shows that he did not lack “knowledge or understanding of the scope and structure of the enterprise.”
See
U.S.S.G. § 3B1.2, cmt. n. 4. Hogan was not a minimal participant, and the district court did not err.
See United States v. Whirlwind Soldier,
V.
The judgment of the district court is affirmed.
Notes
. The Honorable Gary A. Fenner, United States District Judge for the Western District of Missouri.
