Actor; one of the great stalwarts of American film and television -- via westernboothill.blogspot.com. AKA Donald Walter Guadagno. Though stereotyped as a cop or suspect, he had remarkable range and sensitivity. Possessed of more than 100 IMDb credits, he worked from 1949 (Twelve O'Clock High) to 1993, including great work in Bullitt and Papillion. He was "in everything" ("The Untouchables," "The Twilight Zone," "Peyton Place," "The F.B.I.", He stood out because he invested himself in what he was doing onscreen. Even when standing still and listening, he is compelling.