Karmelo Anthony told authorities he acted in self defense after allegedly fatally stabbing Austin Metcalf at a Texas track meet in April.

Karmelo Anthony has been indicted on a murder charge in the stabbing death of 17-year-old Austin Metcalf after an argument during a track meet at Kuykendall Stadium.

Karmelo Anthony, now 18, who is accused of fatally stabbing fellow student Anthony Metcalf during a Texas high school track meet in April, was indicted on a first-degree murder charge in the teen’s death.