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

On Tuesday, June 24, 2025, 18-year-old Karmelo Sincere Anthony was formally indicted for first-degree murder in the fatal stabbing of Austin Metcalf, another teenager. This was announced by Collin County District Attorney Greg Willis. Both individuals were 17 years old when Anthony allegedly killed Metcalf during a high school track meet in Frisco, a suburb of Dallas, Texas. Willis described the incident as “a violent loss.”

The Grand Jury’s decision came after weeks of presenting evidence by the State since the knife attack on April 2, 2025. During this period, Anthony has been under house arrest following his release on a reduced bond on April 14, 2025, according to CBS News.

The death of Austin Metcalf

An arrest report from the Frisco Police Department, reviewed by Oxygen, noted that on the morning of the incident, shortly after 10:00 a.m., school officials responded to a stabbing at David Kuykendall Stadium where a high school track meet was occurring.

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.