Karmelo Anthony, an 18-year-old high school senior from Frisco

 

Texas, has been charged with first-degree murder as an adult under Texas law. The charge stems from the fatal stabbing of 17-year-old Austin Metcalf during a high school track meet on April 2, 2025. Witnesses reported that the incident began as a dispute over seating, which escalated when Anthony allegedly warned Metcalf not to touch him. When Metcalf made physical contact, Anthony reportedly stabbed him in the chest. Anthony remained at the scene and told responding officers that he acted in self-defense.