A teenager in Texas was indicted on murder charges for the April 2025 stabbing of a high school athlete.

On Tuesday, June 24, 2025, Karmelo Sincere Anthony, 18, was formally charged with first-degree murder for the fatal stabbing of fellow teen Austin Metcalf, Collin County District Attorney Greg Willis announced. Both parties were 17 when prosecutors claim Anthony murdered Metcalf at a high school track meet in the Dallas suburb of Frisco, Texas, an event Willis called “a violent loss.”

A Grand Jury returned their decision after weeks of the State “presenting evidence” since the April 2, 2025 knife attack occurred. During that time, the suspect has remained under house arrest after being released on a reduced bond on April 14, 2025, as reported by CBS News.

The death of Austin Metcalf

An arrest report by the Frisco Police Department and reviewed by Oxygen states that on the day of the homicide, just after 10:00 a.m., school officials were called to respond to a stabbing at David Kuykendall Stadium, where a high school track meet took place.

Upon arrival, a resource officer from the Frisco Independent School District (F.I.S.D.) instructed the suspect to keep his hands up.

The suspect, later identified as Centennial High School student Anthony, reportedly said, “I was protecting myself” without prompting by his detainees. Anthony also allegedly claimed, “He put his hands on me,” according to the charging documents.

When the school officer reported to police that he had detained the “alleged suspect,” Anthony reportedly called out, “I’m not alleged; I did it.” Later, in the presence of a Frisco Police officer, Anthony allegedly confessed when he said, “He put his hands on me. I told him not to.”

Another officer stated Anthony was “crying hysterically” throughout the ordeal.

Witnesses claimed a group of students had gathered under a Memorial High School tent due to the threat of rain, and the two involved allegedly began arguing after Metcalf requested Anthony leave. Anthony allegedly told Metcalf, “Touch me and see what happens,” and Austin had, according to the probable cause affidavit.

“A short time later, Austin grabbed Anthony to tell him to move, and Anthony pulled out what [witness] recalled as a black knife and stabbed Austin once in the chest and then ran away,” according to witness statements documented by Frisco officer Taylor Wetzel. “Austin began grabbing his chest and telling everyone to get help.”

The murder weapon was later found in the nearby bleachers.

Despite life-saving measures, Metcalf died on the scene.

The school district did not make surveillance video public, citing student privacy and school security, but did allow ABC Dallas affiliate WFAA to review footage of the killing. Metcalf’s brother previously told the outlet that he held his brother until help arrived.

“I tried to help him,” he said.

Anthony charged with first-degree murder

If convicted, Karmelo Anthony faces life in prison, per the District Attorney’s Office.

“We know this case has struck a deep nerve — here in Collin County and beyond,” D.A. Willis stated when announcing formal charges. “That’s understandable. When something like this happens at a school event, it shakes people to the core.”

Metcalf’s father, Jeff Metcalf, responded to the indictment in a statement reported by CBS News.

“I am pleased that we are moving forward. With the first-degree murder indictment, it now goes into the court system. I fully believe that justice will be served for Austin Metcalf,” he said. “I look forward to the forthcoming trial, but it will never bring my son back.”

Defense attorney Mike Howard, representing Anthony, said he was “confident” that a “fair and impartial” jury would uncover the truth, according to CBS News. Howard contended that his client “may have acted in self-defense.”

In accordance with the Texas criminal justice system, Anthony — should the case go to trial — will be tried as an adult.