A former Kentucky high school football coach was found not guilty Thursday in Louisville, Ky. in the death of a player who collapsed at a practice where the team was put through a series of sprints on a hot summer day.

It was a rare criminal prosecution of a coach in a player’s heat-related death. The jury reached a verdict after deliberating less than two hours.

Former coach David Jason Stinson, 37, was charged after 15-year-old Max Gilpin collapsed at an August 2008 practice as the team ran a series of sprints known as “gassers.” He died three days later at a Louisville hospital of heat stroke, sepsis and multiple organ failure. His temperature reached at least 107 degrees.

Players said Stinson ordered the gassers as punishment for the lack of effort they showed at practice on a day where the temperature and heat index were both 94 degrees.