NOT RECOMMENDED FOR PUBLICATION

File Name: 23a0268n.06

Case No. 22-3593

UNITED STATES COURT OF APPEALS

FOR THE SIXTH CIRCUIT

UNITED STATES OF AMERICA,

Plaintiff-Appellee,

v.

KAMAR LAQUAN COX,

Defendant-Appellant.

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ON APPEAL FROM THE UNITED 

STATES DISTRICT COURT FOR 

THE SOUTHERN DISTRICT OF 

OHIO

OPINION

Before: GILMAN, BUSH, and READLER, Circuit Judges. 

CHAD A. READLER, Circuit Judge. A jury found Kamar Cox guilty of both robbery 

and being a felon in possession of a firearm. At sentencing, the district court applied a Guidelines

enhancement for possessing a firearm during the robbery and a second enhancement for 

obstruction of justice. The court sentenced Cox to 102 months’ imprisonment, near the bottom of 

his Guidelines range. Cox challenges the two enhancements on appeal. We affirm. 

I.

Kamar Cox offered to sell a firearm to a confidential government informant. The firearm 

was either an AR or AK rifle. At the direction of an agent from the federal Bureau of Alcohol, 

Tobacco, Firearms and Explosives, the informant arranged to meet Cox a few days later. The

agent gave the informant $500 to purchase the rifle at the controlled buy. 
Case No. 22-3593, United States v. Cox

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Cox and the informant arranged to meet in an apartment parking lot. As the informant 

drove into the lot, he spotted Cox’s vehicle. The informant pulled alongside Cox’s vehicle and 

then left his own. As he did, the informant noticed a Glock pistol sitting on the center console of 

Cox’s vehicle. After some back and forth, Cox indicated that the pair needed to go inside to make

the exchange. So after reparking their cars, both the informant and Cox exited their vehicles. 

The deal did not go according to plan, however. According to the informant, Cox pulled 

out the Glock and pointed it at the informant while the two of them were walking around the 

building. The informant ran. Cox gave chase, eventually catching up to the informant. Cox then

demanded the “five.” Believing that to mean the $500 to be exchanged as part of the controlled 

buy, the informant handed the cash over to Cox. Cox then drove away. 

The informant’s testimony, however, seemingly wavered at times. Although he testified 

that Cox pulled the Glock gun on him as the two walked around the building, he likewise testified 

that he never saw Cox grab the Glock from the car or possess it in his hands, waistband, or pockets

as Cox walked away from his car or at the time the informant handed the money over to Cox. The

informant likewise confirmed that the Glock was never seen on the video footage once he and Cox 

left their vehicles to walk around the building. 

From this series of events, a grand jury eventually charged Cox with: (1) robbing a person 

exercising lawful control over money of the United States, in violation of 18 U.S.C. § 2114(a),

with a possible enhanced maximum punishment for the aggravated offense of jeopardizing the life 

of the victim by using a dangerous weapon; (2) using, carrying, and brandishing a firearm during 

a crime of violence, in violation of 18 U.S.C. § 924(c)(1)(A); and (3) being a felon in possession 

of a firearm, in violation of 18 U.S.C. §§ 922(g)(1), 924(a)(2). Cox pleaded not guilty to the 

charges, and the case was set for trial. 
Case No. 22-3593, United States v. Cox

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On the eve of the informant’s trial testimony, Cox saw the informant in the courthouse 

hallway. Cox called him a “rat” and a “clown.” The next day, when the informant took the stand, 

Cox abruptly interjected: “Come on, man. You going to sit up there, and let them take my life 

from me, bro.” Against the court’s directives, Cox continued: “Come on, bro. You going to sit 

up and listen to them, and let them cut you, bro. Come on, man.” After a brief recess, the informant 

resumed his testimony. While on the stand, the informant told the jury that Cox had sent letters to 

his grandparent’s home as well as a letter to the informant through a third party. In each letter, 

according to the informant, Cox was trying to convince the informant to “[n]ot come to court.” 

The jury convicted Cox of robbery and being a felon in possession of a firearm. On the 

robbery count, however, the jury did not make the special finding that Cox jeopardized the 

informant’s life by using a dangerous weapon. The jury also acquitted Cox of using and carrying 

a firearm in relation to the robbery. 

At sentencing, the court applied a five-level enhancement under U.S.S.G. 

§ 2B3.1(b)(2)(C), which applies when a “firearm was brandished or possessed” during a robbery. 

After noting Cox’s objection that he had not “brandished” a firearm, the district court overruled it. 

The district court explained that the enhancement applies “whether the firearm was brandished or 

possessed,” and that it was “clear” that, “at a minimum,” the firearm was “possessed.” Over 

objection, the court also applied a two-level enhancement for obstruction of justice under U.S.S.G. 

§ 3C1.1. Factoring in those enhancements, the district court calculated Cox’s Guidelines range as

100 to 125 months. The district court imposed a sentence near the range’s low end: 102 months. 

Cox appealed his sentence, challenging the two enhancements. 
Case No. 22-3593, United States v. Cox

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II.

Cox’s challenges are for procedural reasonableness. United States v. Sands, 4 F.4th 417, 

420 (6th Cir. 2021). In this setting, we review de novo the district court’s legal conclusions in 

imposing the enhancements, and its factual findings under the clear-error standard. United States 

v. Moerman, 233 F.3d 379, 380 (6th Cir. 2000); United States v. Rosales, 990 F.3d 989, 998 (6th 

Cir. 2021). With respect to the obstruction enhancement specifically, we have “sent mixed 

messages” as to whether the district court’s application of the facts is reviewed de novo or with 

“due deference.” Rosales, 990 F.3d at 998 n.2 (citation omitted). We can set that aside, however,

because the application of the two enhancements here was proper even under de novo review. 

Consider first the five-level enhancement for “brandish[ing] or possess[ing]” a firearm 

during the robbery. U.S.S.G. § 2B3.1(b)(2)(C). Cox argues that the district court erred in applying

this enhancement for brandishing because the jury acquitted him of such conduct. This is so, Cox 

says, because relying on acquitted conduct in sentencing violates the Fifth and Sixth Amendment. 

See Jones v. United States, 574 U.S. 948, 948 (2014) (mem.) (Scalia, J., dissenting from denial of 

certiorari) (“We should grant certiorari to put an end to the unbroken string of cases disregarding 

the Sixth Amendment[.]”). There may be something to his argument. See, e.g., United States v. 

Bell, 808 F.3d 926, 928 (D.C. Cir. 2015) (per curiam) (Kavanaugh, J., concurring in the denial of 

rehearing en banc) (“Allowing judges to rely on acquitted or uncharged conduct to impose higher 

sentences than they otherwise would impose seems a dubious infringement of the rights to due 

process and to a jury trial.”); United States v. Sabillon-Umana, 772 F.3d 1328, 1331 (10th Cir. 

2014) (Gorsuch, J.) (questioning whether the Constitution allows a district judge to increase a 

defendant’s sentence “based on facts the judge finds without the aid of a jury or the defendant’s 

consent”). But, as Cox recognizes, Supreme Court and circuit precedent foreclose his argument. 
Case No. 22-3593, United States v. Cox

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United States v. Hills, 27 F.4th 1155, 1196 n.24 (6th Cir. 2022) (citing United States v. Watts, 519 

U.S. 148, 157 (1997) (per curiam)). Perhaps his argument will someday gain traction with the 

Supreme Court or with the Sentencing Commission. Cf. Petition for Writ of Certiorari, McClinton

v. United States (No. 21-1557); The Hon. Carlton W. Reeves, Chair, U.S. Sentencing Comm’n, 

Remarks at the Public Meeting of the United States Sentencing Commission 23 (Apr. 5, 2023), 

available at https://www.ussc.gov/sites/default/files/pdf/amendment-process/public-hearings-andmeetings/20230405/20230405_remarks.pdf (noting that the Sentencing Commission “intend[s] to 

resolve questions involving acquitted conduct next year”). For now, we note only that Cox has 

preserved this currently foreclosed argument.

Cox, however, has a more immediate problem. His enhancement was not based on 

“brandishing” his firearm during the robbery. Rather, the district court explicitly rooted the

enhancement on Cox’s “possess[ion]” of the weapon. See United States v. Oliver, 84 F. App’x 

595, 596 (6th Cir. 2003) (order). As the district court saw things, “it was clear” from the trial 

evidence that “at a minimum, the firearm was possessed.” And possession was not part of the 

statutory charge—“us[ing]/carrying of a firearm”—that the jury acquitted Cox of.

Attempting to cover all bases, Cox also attacks the propriety of the enhancement for

possession. But he does so only in his reply brief. Arguments raised for the first time in reply are 

forfeited. Stewart v. IHT Ins. Agency Grp., LLC, 990 F.3d 455, 457 (6th Cir. 2021). 

That leaves Cox’s challenge to the obstruction enhancement. The enhancement applies to 

one who “willfully obstructed or impeded, or attempted to obstruct or impede, the administration 

of justice.” U.S.S.G. § 3C1.1. We see no error in the district court’s application of that 

enhancement to Cox. Chief among his obstructive behavior, Cox called the confidential informant 

a “rat” in the courthouse hallway on the eve of the informant’s testimony. We previously blessed 
Case No. 22-3593, United States v. Cox

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the enhancement’s application in a similar setting—where a defendant called a testifying witness

a “rat” in a Facebook post “just days” before sentencing. United States v. French, 976 F.3d 744, 

749–50 (6th Cir. 2020) (citation omitted). There, as here, the defendant’s language could be 

“reasonably construed as a threat” to a “witness[] who might testify at the upcoming hearing.” Id.

at 749 (citation omitted). And, keep in mind, this threat was not the full scope of Cox’s obstructive 

conduct. He interrupted the informant’s trial testimony, addressing him directly. Cf. United States 

v. Robinson, 813 F.3d 251, 263 (6th Cir. 2016) (upholding the obstruction enhancement after a 

defendant confronted the potential witnesses outside the courthouse). He also sent letters to the 

informant’s grandparents and to the informant to dissuade the informant from coming to court.

United States v. Wallace, 600 F. App’x 322, 330 (6th Cir. 2015) (upholding the obstruction 

enhancement where the defendant’s text messages were designed to “intimidate” a witness). All 

told, ample evidence supports the obstruction enhancement.

Cox offers a handful of responses. First, he notes that there is “no indication” that the 

district court “applied any standard of proof” on this enhancement. Yet that lone statement, 

adorned with no legal authority, is insufficient to warrant review. See Buetenmiller v. Macomb 

Cnty. Jail, 53 F.4th 939, 946 (6th Cir. 2022). Next, Cox argues that calling someone a “rat” does 

not rise to the level of obstruction. But we have held otherwise, and Cox does not attempt to 

distinguish that precedent. Cox also claims that the courthouse hallway exchange did not affect 

the informant’s willingness to testify. An “actual effect” on a witness’s testimony is not necessary, 

however; the enhancement applies to “attempted” obstruction. United States v. Parsons, 798 F. 

App’x 922, 928 (6th Cir. 2020). Cox characterizes his courtroom interjections as merely an 

“emotional reaction” to the informant’s testimony. Regardless, the enhancement applies when the 

behavior is “reasonably construed as a threat.” French, 976 F.3d at 749 (citation omitted). Lastly, 
Case No. 22-3593, United States v. Cox

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Cox argues that there is “no evidence” that he wrote a letter or caused a letter to be written. That 

claim overlooks the informant’s testimony that Cox sent the letters, record evidence with which 

Cox does not engage. 

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We affirm.