Career
A native of Illinois, Prosser was a versatile supporting performer particularly adept at playing unscrupulous villains, but also satisfactory in character roles and the occasional sympathetic part. Also very prolific on early television shows, he played bit parts in some renowned films but excelled both in B-movies and several cliffhanger serials. Prosser was killed in an automobile accident near Gallup, New Mexico at the age of 52.
