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

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.

A Texas grand jury has indicted Karmelo Anthony for first-degree murder in the stabbing death of high school football player Austin Metcalf