Watch Sadisflix. Dewey Bozella’s life changed forever when he was sentenced to 20 years to life in prison for a murder he did not commit. Throughout his 26 years behind bars, Bozella found strength and purpose through boxing, becoming the light heavyweight champion of Sing Sing Prison, and made it a goal to be proven innocent and box professionally once he was released. ESPN Films chronicles Bozella’s journey from prison cell to professional boxer.