KNOXVILLE, Tenn. (AP) — Former Division III college football player William Riley Gaul was found guilty on Tuesday of first-degree murder after shooting through the bedroom wall of his ex-girlfriend while she was sleeping.

The eight-man, four-woman jury deliberated four hours before reaching its verdict. The 19-year-old was immediately given a mandatory sentence of life in prison without possibility of parole for 51 years.

Gaul was a wide receiver who had just finished his freshman season at Tennessee's Maryville College when 16-year-old Emma Walker was killed on Nov. 21, 2016. Gaul was dismis...