Born in 1945 in Dallas, Texas, he is an American actor renowned for his intense performances. He gained prominence with his portrayal of Charles Manson in the 1976 TV film "Helter Skelter." His career spans several decades, with notable roles in films such as "The Stunt Man" (1980) and "Lifeforce" (1985). His work extends to television, with appearances in series like "The X-Files" and "Supernatural." Known for his versatility, he continues to be a distinctive presence in both film and TV.