Karmelo Anthony, 19, was charged with first-degree murder in the April 2025 death of 17-year-old Austin Metcalf in Frisco, Texas.

The 19-year-old has been charged with first-degree murder for the fatal stabbing of Austin Metcalf, 17, at a track meet in Frisco, Texas.

Defense attorneys insist the teen felt threatened and believed he needed to defend himself