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

Police say Karmelo Anthony killed Austin Metcalf, 17, on April 2 at the District 11-5A track meet at David Kuykendall Stadium in Frisco.

A teen accused of fatally stabbing another student at a high school track meet in suburban Dallas was indicted Tuesday on a murder charge, a prosecutor said.