Westerman is best known as a musician and an actor who appeared in over 50 films and series, including Dances with Wolves, Hidalgo, DreamKeeper, and The Doors. He appeared in some important genre television programs, as well, including Millennium, The Pretender, Poltergeist: The Legacy, and multiple episodes of The X-Files, in which he portrayed the character Albert Holsteen. In 2006, he won a NAMMY Award for his third music album.
Beyond being an entertainer, the Sisseton-Wahpeton Dakota Westerman was an activist, a member of the American Indian Movement and a spokesman for the International Indian Treaty Council. His first album, Custer Died for Your Sins, provided a soundtrack and slogan for the Red Power Movement of the late 1960s and early 1970s.
Read his obituary at Native American Times.