FRISCO, Texas - Newly released video from an officer's body camera and a surveillance camera at a Texas running track captures the moments after a teenage athlete fatally stabbed another teen from a rival team in the stadium bleachers during a high school meet last year.

Karmelo Anthony, 19, was convicted of murder on June 10 in the death of Austin Metcalf, 17, and sentenced to 35 years in prison.

A jury rejected Anthony's claims of self-defense.