Celso Tirado (Tirado) was charged with and convicted of conspiracy to distribute methamphetamine (Count I) and charged with possession of methamphetamine with intent to distribute (Count II), but was convicted of the lesser included offense of possession of methamphetamine. 21 U.S.C. §§ 841(a)(1), 846 (2000). The district court 1 sentenced Tirado to 121 months imprisonment on Count I and six months on Count II, to run concurrently. Tirado alleges the district court erred in (1) denying his motion to suppress, (2) calculating the quantity of methamphetamine used for sentencing, and (3) applying the obstruction of justice enhancement. We affirm.
I. BACKGROUND
On August 24, 2000, Jeff and Paul Schwarz, criminal investigators with the Dawson County, Nebraska, Sheriffs Office (DCSO), used a confidential informant to make a controlled purchase of methamphetamine from Tirado and another man at a bar in Lexington, Nebraska. After the informant spent a short time in the bar, he came out with Tirado. Tirado lifted up his own shirt and appeared to try to get the informant to raise his shirt, as if looking for a hidden wire. The informant ran from Tirado, and Tirado chased him first on foot and then in his Chevy Blazer. The informant took refuge in the officers’ unmarked vehicle. Tirado pursued the informant and the officers in his Blazer and cornered them in an alley. Believing they were ambushed, the officers drew their weapons and pointed them at Tirado, who then drove away.
About two months later, law enforcement officers received information that Ti-rado and another man had made death threats against the investigators, Jeff and Paul Schwarz, and their families. Halloween night was the rumored attack date. On the afternoon of October 31, 2000, three DCSO officers and two INS officers went to Tirado’s residence to investigate the death threats and to execute a bench warrant for Tirado’s arrest. When the officers arrived, Armando Quezada (Queza-da) answered the door. When an INS agent asked for identification, Quezada ap *439 peared nervous, turned away and moved quickly into the trailer. Fearing that Que-zada might be running out the back or retrieving a weapon, the INS agent and Jeff Schwarz followed Quezada into 'the trailer. Once inside, the officers noticed drug paraphernalia. Upon request by the officers, Quezada gave permission to search his bedroom, resulting in the discovery of illegal drugs.
While officers were inside the trailer, Tirado approached outside. Paul Schwarz confronted Tirado and arrested him pursuant to the bench warrant. Schwarz advised Tirado of his rights. According to the officers, Tirado gave Schwarz permission to search his bedroom. Tirado denies giving his permission.
While searching Tirado’s bedroom, an officer saw a book bag hanging in the closet. The officer searched the bag and found a scale, methamphetamine, ammunition and cash. Tirado later admitted the bag was his and contained ammunition. He denied knowing the bag contained drugs or drug paraphernalia. The total methamphetamine found in Tirado’s residence was 128.72 grams, which Tirado moved to suppress. The district court denied this motion.
At trial, two witnesses testified they received an additional 99.05 grams of methamphetamine from Tirado. At sentencing, the district court attributed. 227.77 grams of methamphetamine to,Tirado as relevant conduct to the conspiracy. In addition, the district court applied a two-level obstruction of justice enhancement for Tirado’s conduct on August 24. The district court sentenced Tirado to 121 months imprisonment on Count I and a concurrent six months on Count II.
II. DISCUSSION
A. Motion to Suppress
We review the district court’s factual findings for clear error and the conclusions of law de novo.
See United States v. Wells,
228 F.Bd 835, 838 (8th Cir.2000). The district court’s finding of consent to search is reviewed for clear error.
United States v. Heath,
Tirado claims the warrantless search of his residence violated the Fourth Amendment’s protection against unreasonable search and seizure, and the items found should have been suppressed. First, Tirado argues the officers unlawfully followed Quezada into the residence. Second, Tirado argues he never consented to a search, but if he had, the officers exceeded the. scope of his consent to search his bedroom when they searched his closet and. a closed bag hanging in the closet. The magistrate judge 2 and the district court provided detailed and well-reasoned opinions on these issues and we affirm with little comment.
The officers went to Tirado’s residence to execute a bench warrant for Tirado’s arrest and- to investigate death threats allegedly made by Tirado against Jeff and Paul Schwarz. These duties were carried out against the backdrop . of the earlier dangerous chase involving Tirado. Viewed in light of these facts, when Quezada appeared nervous and abruptly retreated into the residence, the officers were justified in following Quezada to protect themselves.
See United States v. Hill,
*440
The district court did not err in finding Tirado voluntarily consented to a search of his bedroom based on the credibility of the officers’ testimony.
See Schneckloth v. Bustamonte,
B. Sentencing Issues
“The correct application of the guidelines is a question of law subject to de novo review,” while a “factual determination of the sentencing court is reviewed under a clearly erroneous standard.”
United States v. Collins,
1. Quantity of Methamphetamine
Tirado argues the district court erred in calculating the amount of methamphetamine used to sentence him. First, Tirado asserts the 128 grams of methamphetamine were found in his residence during an unreasonable search and should be excluded from the sentencing calculation. Because Tirado’s Fourth Amendment rights were not violated by the search of his residence, this argument fails.
Second, Tirado notes the jury found him guilty of the lesser included offense of possession of methamphetamine rather than possession with intent to distribute, and argues use of the acquitted conduct for sentencing is unreasonable and irresponsible. The district court found all 227.77 grams of methamphetamine were attributed to Tirado as relevant conduct to the conspiracy count. Even if the 128 grams found in Tirado’s residence were attributable to the acquitted conduct of Count II, the district court still would not have erred in using that evidence to sentence Tirado. This Circuit allows acquitted conduct to be used for sentencing purposes if proved by a preponderance of the evidence, especially when a conspiracy charge is included.
United States v. Woods,
2. Obstruction of Justice Enhancement
The Sentencing Guidelines allow a two-level obstruction of justice enhancement. U.S.S.G. § 3C1.1 (2001). Qualifying conduct includes “threatening, intimidating, or otherwise unlawfully influencing a co-defendant, witness, or juror, directly or indirectly, or attempting to do so.” Id. cmt. n. 4(a).
Tirado argues “there is inadequate evidence to show that Tirado knew that an investigation was underway” when he confronted the informant on August 24, 2000. *441 Tirado argues the evidence, at best, “shows that Tirado was attempting to find out if an investigation was underway.” Ti-rado concedes the evidence comes close to suggesting Tirado knew of an impending investigation, but argues the evidence fails to establish Tirado actually knew the investigation was underway.
Our Court was confronted with a similar case in
United States v. Watts,
In
Brown v. United States,
Like Tirado, the defendant in
Brown
also argued “he did not have actual knowledge of an ongoing criminal investigation,” so he could not have obstructed justice.
Id.
Our court observed that willful obstruction of justice “should be reserved for the more serious case, where misconduct occurs with knowledge of an investigation,
or at least with a correct belief that an investigation is probably underway.” Id.
(quoting
United States v. Oppedahl,
Tirado relies on
United States v. Oppedahl,
where the defendant told a major LSD customer that he would kill him if he ever “narked” on the defendant’s supplier.
Oppedahl,
Factually, Tirado’s case fits somewhere between Watts/Brown and Oppedahl. As in each of those cases, this court will not reverse the district court’s factual determination, here finding Tirado believed an investigation was probably underway, because the determination was not clearly erroneous.
*442 Tirado lifted up his shirt and appeared to try to get the informant to lift his shirt. It is reasonable to infer Tirado was looking for a wire, which would lead to the reasonable inference Tirado believed an investigation was “probably underway.” Tirado then chased the informant on foot and with his Blazer. Because Tirado had a correct belief that an investigation was underway and threatened and intimidated the informant, the district court correctly applied the two-level obstruction of justice enhancement.
III. CONCLUSION
For the reasons discussed above, the district court is affirmed in all respects.
