Austin Metcalf, a 17-year-old Frisco Memorial High School junior, died Wednesday, April 2, 2025, when he was stabbed by another student at a track meet, according to police. Karmelo Anthony is on trial, and the jury can consider murder or manslaughter, the judge ruled on Tuesday, June 9, 2026. In a Collin County murder case in which a jury’s assessment of whether a killing at a high school track meet was justified by self-defense is at its heart, the panel’s deliberation is underway.