Broken Agreement Between Prosecutors and Defense at the Heart of Karmelo Anthony New Trial Push
A stunning new court filing has pulled back the curtain on what Karmelo Anthony’s legal team describes as a secret pretrial understanding that, when allegedly abandoned by prosecutors at the worst possible moment, upended an entire trial strategy and silenced the defendant himself. The filing raises serious questions about what truly unfolded behind closed doors in one of North Texas’s most high-profile murder cases in recent memory.
,Anthony, 19, was found guilty of murdering 17-year-old Austin Metcalf at an April 2025 high school track meet in Frisco, Texas., ,The fatal confrontation took place during a track meet at Kuykendall Stadium, where prosecutors said Anthony stabbed Metcalf in the chest during an altercation under a team tent., ,Anthony never denied plunging the knife into Metcalf’s torso, but argued that he acted in self-defense when he felt threatened by the larger teen., ,A Collin County jury sentenced Karmelo Anthony to 35 years in prison after finding him guilty of murder., He will be eligible for parole after serving half of that term.
Now, a newly filed affidavit by his original trial attorney, Mike Howard, is at the center of a 63-page motion seeking to have that conviction thrown out entirely.
The Alleged Gentlemen’s Agreement
,According to the motion, prosecutors and defense attorneys reached an understanding before trial to limit evidence to what occurred during the altercation under the track meet tent, excluding character evidence and prior bad acts involving either Karmelo Anthony or Austin Metcalf., ,The motion said prosecutors proposed that both sides promise to “try the case clean” and to stick to “what happened under the tent,” with the reputations or characters of Metcalf, his twin brother Hunter Metcalf and Anthony all considered off-limits under the deal.,
,The motion alleges the agreement was discussed during multiple meetings and presented to the court during an off-the-record conference in chambers, with defense attorneys saying that understanding was intentionally kept off the public record, only documented in a generic motion in limine that was hand-delivered to the court and never appeared on the docket.,
Howard’s affidavit describes the arrangement as a “gentlemen’s agreement,” one that the defense says it built its entire trial strategy around. According to the filing, the defense forfeited significant opportunities it would otherwise have pursued. ,Anthony’s attorneys argue they relied on that agreement throughout the trial, limiting their voir dire questioning, opening statements and cross-examination of witnesses., ,The motion also claims the defense chose not to call two expert witnesses, including a neuropsychologist who would have testified about Anthony’s epilepsy.,
The defense also says it chose not to confront the prosecution’s witnesses with evidence it had gathered about Austin and Hunter Metcalf, including allegations involving a reputation for violence, bullying and an alleged prior arrest involving racist graffiti. ,The motion states that “the defense tried its case under that limitation, at every stage, in reliance on the bargain,” and that it allowed the prosecution’s student witnesses to leave the stand without being confronted with their own recorded statements to police about Austin Metcalf’s demeanor., Those allegations are part of the defense filing and do not constitute findings by any court.
A Last-Minute Collapse
The affidavit describes what the defense characterizes as a shocking about-face by the prosecution on the final day of evidence presentation. ,Prosecutors told the defense team the agreement had “never contemplated a testifying defendant,” and argued the defense had violated the agreement by mentioning in opening statements that Anthony played chess.,
,The filing says the judge indicated there was no way to enforce the alleged agreement and warned that Anthony could face character and extraneous-offense evidence if he took the stand., According to the affidavit, Judge John Roach Jr. did not agree that the chess reference had broken the deal, but acknowledged he lacked a mechanism to enforce the arrangement between the parties.
What happened next proved to be one of the most consequential moments of the entire trial. ,The defense argues that Anthony was given only ten minutes to decide whether to testify and ultimately chose not to., ,They argue the alleged change in the prosecution’s position effectively deprived Anthony of presenting his version of events and left the defense unable to undo earlier strategic decisions made in reliance on the agreement.,
Howard wrote in his affidavit that the defense feared putting Anthony on the stand could have opened the door to damaging character evidence, prior bad acts and other information that, under the original understanding, was never supposed to reach the jury’s ears. The filing describes the decision not to testify as a “180-degree change in the defense strategy” driven entirely by what Howard characterizes as the prosecution’s breach.
,The motion also points to the pace of the trial, arguing the court expedited proceedings by holding court on a Saturday, requiring the defense to begin presenting witnesses immediately after the prosecution rested, and denying defense counsel additional time to advise Anthony about whether he should testify.,
Calls for a New Judge
The new court filings go beyond demanding a new trial. ,Anthony’s attorneys are also seeking to have District Judge John Roach Jr. removed from presiding over any post-trial proceedings because of public statements he made after the trial that they alleged put his impartiality into question.,
,In a televised interview with WFAA two days after Anthony was convicted and sentenced, Roach was asked whether the jury got it right, to which the judge answered, “Yeah, they did.” When asked whether Anthony received a fair trial, Roach said, “I certainly think he did.”,
,Judge Roach is expected to refer the recusal motion to a regional administrative judge, who will determine if a formal hearing is warranted.,
,Anthony’s attorneys argue that the alleged breakdown of the agreement violated his constitutional rights, and if their allegations are proven, the conviction should be set aside and a new trial ordered.,
Prosecution Pushes Back
The Collin County District Attorney’s office has not taken the allegations lying down. ,First Assistant District Attorney Bill Wirskye said in a statement that Anthony’s new lawyers filed a motion containing several inaccurate characterizations of the trial proceedings, and that he and the entire prosecution team conducted the trial ethically and in full compliance with the court’s rulings and any agreements with defense counsel, adding that a written response would be filed with the court in the coming weeks.,
,The prosecution’s statement emphasized that the jury heard extensive evidence over the course of the trial and returned a unanimous verdict, expressing full confidence in both the verdict and the fairness of the proceedings.,
What Comes Next
,Anthony filed a notice of appeal a day after the verdict, which sent the case to the 5th Court of Appeals in Dallas, where appellate justices will review the trial proceedings to affirm or overturn the jury’s decision., ,A new team of lawyers led by Dallas attorney Russell Wilson is representing Anthony in his appeal and in the motions filed this week.,
,Anthony is currently serving his sentence at the Wallace Pack Unit in Navasota while the post-trial motions remain pending., ,No date has been set for any arguments on the motions.,
The case continues to draw intense public attention across North Texas. At its core, the new filings present a picture of a trial where an unwritten agreement between opposing legal teams may have altered the outcome in ways that a jury never fully understood. Whether a Collin County court ultimately agrees that Anthony deserves a second chance will now depend on whether judges find merit in the claim that a handshake deal, one never committed to the public record, was powerful enough to shape a murder conviction.