A jury found William Mabie guilty of three counts of mailing threatening communications, in violation of 18 U.S.C. § 876(c), and one count of interstate communication of a threat, in violation of 18 U.S.C. § 875(c). The district court 1 sentenced Mabie to 88 months’ imprisonment. Mabie appeals both his conviction and sentence, arguing that (1) the district court violated his right to self-representation, (2) the district court abused its discretion in quashing the witness subpoenas that Mabie requested, (3) insufficient evidence exists to support his convictions, (4) Mabie’s conviction under § 876(c) violates his First *326 Amendment rights, (5) the district court erred in assessing a two-level obstruction-of-justiee enhancement, and (6) Mabie’s sentence is unreasonable. We affirm.
I. Background
On July 23, 2009, a federal grand jury returned a superceding indictment charging Mabie with seven counts of making threatening communications. Mabie requested to proceed pro se, and, on April 22, 2010, the district court granted Mabie’s request. Mabie filed a number of pro se motions for witness subpoenas. The district court held two hearings in which it determined, among other things, whether and to whom subpoenas should be issued. In a hearing before the court on May 7, 2010, Mabie repeatedly interrupted the court and prosecutor. In another hearing on June 23 and 24, 2010, Mabie accused the court of lying, demonstrated a lack of decorum, and ultimately refused to participate in the proceedings. At the conclusion of the hearing, the district court authorized the issuance of witness subpoenas to 42 proposed witnesses, and soon thereafter Mabie dispatched a series of letters in which he openly boasted of using the court’s subpoena power for the purpose of harassing proposed witnesses and their families and offered to drop the subpoenas if he was paid $21,000.
On July 14, 2010, the government filed motions to revoke Mabie’s pro se status and to quash his numerous trial subpoenas. Following a hearing, the district court granted the government’s motion to revoke and granted in part and denied in part the motion to quash. In its opinion, the district court noted that, “when given authority to request subpoenas, [Mabie] has abused the process afforded to him. He has made open and veiled threats to some proposed witnesses and attempted to solicit money in exchange for withdrawing subpoenas.” The court also noted that Mabie was “intent on pursuing theories that will consistently be disallowed, and he becomes openly hostile and inattentive to rulings and objections. He ... has demonstrated serious abuse of court empowerment.” The district court quashed subpoenas to 34 of Mabie’s proposed witnesses.
Trial evidence showed that Mabie worked for Affordable Towing in St. Louis, Missouri, until the spring of 2007. After that job ended, Mabie made phone calls and sent letters to Steve Reisch, the owner of Affordable Towing. Mabie demanded the return of tools and a toolbox that he had left at the business. In July 2008, Mabie sent an anonymous letter to Reisch’s elderly mother, Betty Reisch, at her unlisted home address in Kirkwood, Missouri. In the letter, Mabie accused her “pothead son” of stealing from him and stated that
the only way he could get away with it is if no one knows who did it, and the ACTUAL owner is not ready to put several bullets in his head and his kids and grandkids heads.
This is a problem, as it would take hours to clean up the blood.
Betty Reisch had only one son, Steve Reisch, and the letter was signed in the name of her deceased husband, Forrest Reisch. Betty Reisch testified that she had no idea who sent the letter and that she was “very much” afraid when she received it. Steve Reisch reported the letter to police.
Mabie made objectionable communications to a number of other people. Mabie called Steve Reisch’s friend, Lieutenant Mike Deeba of the St. Louis Metropolitan Police Department (SLMPD). In one voice message left on Lieutenant Deeba’s .office phone, Mabie suggested that someone should check on Lieutenant Deeba *327 because he “might be up in his office hanging himself or committing suicide.” In another message, Mabie declared that June 5 was “Charles Deeba’s birthday, or would be if he was still alive. Funny how I know things like this isn’t it----See you in Greenville.” Charles Deeba was Lieutenant Deeba’s deceased uncle, and at the time Lieutenant Deeba and his family lived in Greenville, Illinois. Mabie also spoke with Sergeant A1 Klein of the SLMPD, who asked Mabie to stop contacting Lieutenant Deeba. Mabie told Sergeant Klein, “I was right there in Barnes Hospital when ... Sergeant Dodge brought in a [sic] Bob Stanze. With that cemetery blue look. I think Deeba would look about right that color. I can hit what I’m aiming at for 400 f---ing yards.” Bob Stanze was a SLMPD officer who was fatally shot in the line of duty. On August 4, 2008, Mabie told Sergeant Klein over the phone that if Sergeant Klein did not investigate Lieutenant Deeba, Mabie would confront Lieutenant Deeba’s wife. Mabie also called Sergeant Tony Brooks of the Green-ville Police Department and told him that Lieutenant Deeba had challenged him to a gun fight:
But like I told him, that St. Louis police thinks a gun fight [is] at 15 yards. I’m, I’m from down here [in] Festus[, Missouri], I think they should be about 300. I’m fighting at 300, I don’t think they can make it at 15. So, anyway, yeah keep your eye on [Lieutenant Deeba’s] address though I serious[ly] doubt that[ ] it[’s] going to be a tranquil area much longer.
Sergeant Brooks went immediately to Lieutenant Deeba’s residence and conducted a search of the property. Lieutenant Deeba also went to Greenville and instructed his wife and children on how to use firearms. That same day, officers from the Jefferson County, Missouri Sheriffs Office went to Mabie’s home and placed him under arrest. Prior to his arrest, Mabie stated that he could shoot Lieutenant Deeba at 600 yards.
At trial, the government also presented evidence of letters that Mabie had sent to two Franklin County, Missouri prosecutors. Mabie sent a handwritten letter to Franklin County Prosecutor Rodney McKinney, who had prosecuted Mabie in 2004. This letter, sent to McKinney’s unlisted home address and dated February 12, 2009, accused McKinney of “helping car thieves” and told McKinney to admit that he had lied or Mabie would “stop by some evening, so we can work toward justice.” McKinney, who had been the target of a derogatory flier that Mabie circulated following the 2004 prosecution, testified at trial that he thought this was an escalation in Mabie’s behavior and that he perceived that last statement as a threat. The letter prompted McKinney to immediately contact the police.
On February 21, 2008, Franklin County Assistant Prosecutor Mary Choi, who had prosecuted Mabie in 2006, also received a letter from Mabie. Mabie accused Choi of prosecutorial misconduct and demanded that she “take corrective action.” The letter concluded: “A cornerstone of this society (for which countless have died) is a fair Justice system, honesty is essential, correct your mistakes / without delay or suffer the consequences.” Choi testified that she perceived this last sentence as a threat to harm her. She also believed that Mabie “was not a stable individual and was obsessed with harassing people.” As a precaution, Choi alerted security at the courthouse where she worked of Mabie’s comments and her concerns. Choi also received two additional letters from Mabie at her unlisted home address, which were derogatory and disturbing in nature. One letter, which was addressed to her husband, stated: “If Mary ... makes *328 things right, she may have a happy life, but if she does not, these lies will follow her forever, I AM ABSOLUTELY SURE IT WILL.”
At trial, Mabie took the stand in his defense and testified that he did not intend to harm anyone, did not dislike Mary Choi, and only wanted to “make things right.” Mabie was convicted of three counts of mailing threatening communications, in violation of 18 U.S.C. § 876(c), and one count of interstate communication of a threat, in violation of 18 U.S.C. § 875(c). On October 4, 2010, Mabie filed a pro se motion to restore his right of self-representation, which the district court denied. At Mabie’s sentencing hearing on November 10, 2010, Mabie objected to a two-level enhancement for obstruction of justice on each count. The district court determined that the enhancement applied and sentenced Mabie to 88 months’ imprisonment.
II. Discussion
Mabie raises six issues on appeal. He contends that (1) the district court violated his right to self-representation, (2) the district court abused its discretion in quashing the witness subpoenas that Mabie requested, (3) insufficient evidence exists to support his convictions, (4) Mabie’s conviction under § 876(c) violates his First Amendment rights, (5) the district court erred in assessing a two-level obstruction-of-justice enhancement, and (6) Mabie’s sentence is unreasonable.
A. Right to Self-Representation
First, Mabie argues that his pretrial actions did not rise to the level of disruption that would warrant revocation of his pro se status, and even if they did, the district court’s failure to warn Mabie that his right to self-representation could be revoked or to use any less restrictive means prior to reinstating counsel violated his right to self-representation. ‘We review the district court’s decision
de novo.” United States v. Mosley,
While a defendant’s right to self-representation is a highly valued right,
Faretta v. California,
This case resembles
Mosley,
where we determined that the revocation of a defendant’s pro se status was warranted.
As in
Mosley,
the totality of Mabie’s disruptive behavior provided the district court with sufficient grounds to revoke his pro se status. We find no error in the district court’s revocation of Mabie’s pro se status. In pretrial hearings, Mabie repeatedly disrupted the proceedings and was openly hostile, disrespectful to the court, and inattentive. Mabie also sought to use the court’s subpoena power to dissuade potential witnesses.
See United States v. Myers,
Nor did the district court err when it denied Mabie’s request to proceed pro se during sentencing. On August 3, 2010, two weeks before trial, Mabie sent a letter to his attorney, in which he asked, “IS THE ONLY WAY TO GET YOU OFF THIS -CASE IS TO PHYSICALLY ASSAULT YOU IN THE COURTROOM? This case is my entire life, if I have to go there I will[.]” As a result of the letter, the district court arranged sua sponte for Mabie to wear a stun belt during trial, and the court cautioned Mabie’s attorney to stay a safe distance from Mabie during the trial. Based on Mabie’s misconduct throughout the course of the litigation and even up to the trial itself, the district court had ample reason to believe that Mabie’s noncompliance with the relevant rules of procedure and substantive law would continue during sentencing.
B. Request for Subpoenas
Mabie also argues that the district court abused its discretion when it granted the government’s motion to quash 34 of Mabie’s witness subpoenas and that quashing the subpoenas violated his Fifth and Sixth Amendment rights.
A district court’s decision to quash subpoenas is reviewed for an abuse of discretion.
United States v. Bueno,
In ex parte hearings conducted before the district court on May 7, 2010, and June 23 and 24, 2010, the district court gave Mabie the opportunity to justify a subpoena for each proposed witness. On July 20, 2010, Mabie requested additional subpoenas, some of which the government challenged, and Mabie again had the opportunity to support those subpoena requests. Mabie’s proffered reasons fell well short of providing exculpatory evidence. Mabie alleged that a few of the proposed witnesses would have testified that he was trying to resolve the conflict with his former employer properly; however, he did not establish how such testimony would have affected the outcome of his case.
Cf. United States v. Blade,
C. Sufficiency of the Evidence
Mabie contends that no reasonable jury could have found that each of the four communications for which he was convicted contained a true threat in violation of 18 U.S.C. §§ 875(c) or 876(c). A “true threat” is defined as a “statement that a reasonable recipient would have interpreted as a serious expression of an intent to harm or cause injury to another.”
Doe v. Pulaski Cnty. Special Sch. Dist.,
Barcley
is distinguishable. First, in evaluating the sufficiency of the evidence in
Barcley,
“we [were] mindful that the letter communicated a client’s dissatisfaction with the services of his attorney,” a communication which falls within the purview of the First Amendment.
Id.
at 933. Second, neither Barcley’s attorney nor the prosecutor referenced in the letter testified that they experienced fear upon read
*331
ing the letter.
Id.
at 934. In order to decide whether there is sufficient evidence from which the jury can find that a reasonable recipient would interpret a communication as a threat, “the communication must be viewed in ‘textual context and also in the context of the totality of the circumstances in which the communication was made.’ ”
United States v. Floyd,
Material differences in both the content and context of the communications distinguish those that Mabie made from those that Barcley made. Mabie’s July 2, 2008 letter to Betty Reisch at her unlisted home address that was signed in the name of her deceased husband accused Mrs. Reisch’s son of stealing and stated that he could get away with it only if “the ACTUAL owner [was] not ready to put several bullets in [his] head and his kids and grandkids heads.” The letter continued, “This is a problem, as it would take hours to clean up the blood.” Mrs. Reisch testified at trial that she was “very much” afraid when she received it.
Mabie’s August 4, 2008 telephone conversation with Sergeant Brooks followed a series of phone calls and messages to Lieutenant Deeba that had escalated in tone and hostility. Mabie suggested that he knew where Lieutenant Deeba lived even though Lieutenant Deeba’s home address was unlisted, made references to Lieutenant Deeba’s wife by name, and suggested that he wanted to engage Lieutenant Deeba in a “gun fight” with a high-powered rifle. After Mabie’s phone conversation with Sergeant Brooks, the Greenville Police Department searched Lieutenant Deeba’s property, and Lieutenant Deeba instructed his wife and children on how to use firearms in the event that Mabie attacked them.
Mabie’s February 21, 2008 letter to Prosecutor Choi, which was sent to her new workplace in a different county several years after she prosecuted Mabie, also constituted a true threat. Choi testified that she perceived the letter as a threat in part because she was aware that Mabie was “not a stable individual.” She shared the letter with several coworkers and notified security at her office to be mindful of Mabie. Choi also received two subsequent letters at her home address, one which was addressed to her husband and stated, “If Mary ... makes things right, she may have a happy life, but if she does not, these lies will follow her forever, I AM ABSOLUTELY SURE IT WILL.”
Finally, Mabie’s February 12, 2009 letter to Prosecutor McKinney, which was sent to his home address years after McKinney’s prosecution of Mabie, accused McKinney of prosecutorial misconduct, demanded that McKinney admit to it, and concluded, “If I don’t hear from you, I’ll stop by some evening, so we can work toward justice.” McKinney stated at trial that he perceived this statement as a threat, and he alerted the St. Louis County Police Department soon after reading the letter.
The content of these four communications examined in the context in which they were made could enable a reasonable jury to find that each communication constituted a true threat under the law.
*332 D. First Amendment Challenge
Mabie also alleges that 18 U.S.C. § 876(c) violates the First Amendment because it is unconstitutionally overbroad and vague. Mabie argues that the statute is overbroad because it does not require a finding that the defendant actually intended the communication to be a threat. Mabie arg-ues that the statute is vague because it fails to define the term “knowingly.”
1. Overbreadth Challenge
Mabie concedes that the First Amendment does not afford protection against prosecution for true threats. He argues that the statute at issue is not limited to true threats because it does not require a finding that the defendant actually intended to communicate a threat. In support of his argument, Mabie cites
Virginia v. Black,
We have never expressly stated that a defendant’s subjective intent to threaten is not a necessary element of a true threat analysis.
Cf. Floyd,
The government need not prove that Mabie had a subjective intent to intimidate or threaten in order to establish that his communications constituted true threats. Rather, the government need only prove that a reasonable person would have found that Mabie’s communications conveyed an intent to cause harm or injury.
Cf. United States v. White,
No. 7:08-CR-00054,
2. Vagueness Challenge
The statute is not void for vagueness either. The void-for-vagueness doctrine protects persons by providing “fair notice” of a statute’s applicability and by preventing “arbitrary and discriminatory prosecutions” of a statute’s enforcement.
Skilling v. United States,
— U.S. —,
18 U.S.C. § 876(c) provides:
Whoever knowingly so deposits or causes to be delivered as aforesaid, any communication with or without a name or designating mark subscribed thereto, addressed to any other person and containing any threat to kidnap any person or any threat to injure the person of the addressee or of another, shall be fined under this title or imprisoned not more than five years, or both.
(Emphasis added.) In
Floyd,
we recognized that 18 U.S.C. § 876(c) is “somewhat ambiguous with regard to what the word ‘knowingly’ modifies.”
Our prior interpretations of § 876(c) comport with a plain reading of the statute. The word “knowingly” appears in the statute at the beginning of the text and is separated from any language about the threatening nature of the communication. Also, the phrase “knowingly so deposits or causes to be delivered as aforesaid” is followed by a comma, setting it off from the subsequent text. Finally, “any communication ... containing any threat” is covered by the provision. There is nothing in the language of the statute to suggest that the threat contained must be one that the defendant intended to make. For all of these reasons, we find that § 876(c) is not unconstitutionally vague.
E. Obstruction-of-Justice Enhancement
Next, Mabie contends that the district court improperly assessed a two-point enhancement for obstruction of justice. Mabie contends the district court erred by finding that Mabie willfully gave false testimony at trial. “We review a district court’s factual findings underlying an obstruction of justice enhancement for clear error and its construction and application of the guidelines de novo.”
United States v. Mendoza-Gonzalez,
Mabie testified at trial that the four communications for which he was convicted were not intended as threats; rather, Mabie said that he was trying to stop certain crimes from occurring and “get things back on the right track.” Mabie also testified that Lieutenant Deeba had challenged him to a gunfight but that Mabie did not want any part of it. Finally, he stated that he did not dislike Choi and that she shared his views that the Franklin County prosecutors were corrupt. At sentencing, the district court determined that Mabie testified falsely regarding his motives for making the threatening communications, his conversations with Lieutenant Deeba concerning the gunfight, and his relationship with Choi. According to the court, “[t]hose facts become material because he is trying to mischaracterize the threats he made.”
In light of “the district court’s superior position from which to judge credibility,”
United States v. Stulock,
F. Reasonableness of the Sentence
Finally, Mabie contends that a Guidelines sentence of 88 months’ imprisonment is unreasonable in this case because the district court failed to consider that Mabie did not have a violent criminal history, that he behaved extremely well at trial, that the threats he made were mild and indirect, and that no one suffered physical harm as a result of his conduct. We review the reasonableness of a defendant’s sentence for an abuse of discretion.
United States v. Reynolds,
The district court did not abuse its discretion in sentencing Mabie to a term of 88 months’ imprisonment. The district court considered the entirety of Mabie’s criminal record, which includes two convictions for harassment to frighten or disturb another person, an undated charge of harassment to frighten or disturb, and a conviction for third-degree assault and first-degree trespassing. The district court also made reference to Mabie’s courtroom behavior in pronouncing the sentence: “[W]hile Mr. Mabie is a highly intelligent individual,” “there is something about this case that [is] hard ... to explain .... [I]t can be done in talking about the irrational approach he takes and the lack of willingness to move on and really focus on the harm done.” Mabie contends that the court erred by failing to consider his good behavior during trial. The district court was mindful, however, that Mabie’s good behavior during trial may not have been entirely due to his desire to excel in deportment but perhaps also due to the stun belt that he wore throughout the course of the trial. The district court also considered the nature of Mabie’s threatening communications and the resulting harm that they inflicted:
[W]hile no physical harm is traceable to the offenses, the emotional harm is very substantial in this case. I had an opportunity to see the various victims testifying in this case, and their lives have been changed by — by these threats. They made a real impact on me in terms of the emotional toll, the clarity with which the various victims recalled all of the incidents and how it impacted them. So while there has been no physical harm caused, the emotional strain has been very, very substantial in this case. So these are serious offenses....
The district court took into consideration all of the relevant factors in sentencing and imposed a sentence to reflect the seriousness of the offenses, to provide adequate deterrence, to protect the public from further crimes, and to provide Mabie with needed training and treatment. See 18 U.S.C. § 3553(a). The court did not abuse its discretion by imposing a Guidelines sentence of 88 months’ imprisonment.
III. Conclusion
Accordingly, we affirm the judgment of the district court.
Notes
. The Honorable E. Richard Webber, United States District Judge for the Eastern District of Missouri.
. Mabie cites to
United States v. Dougherty,
