Dorman was born in St. Louis, Missouri, in 1942. He joined the Southern California-based Iron Butterfly for its second and best-known album, ‘In-a-Gadda-Da-Vida’ which was released in 1968. The 17-minute title track helped the album sell more than 30 million copies, and a three-minute version of the song became a Top 40 hit.According to a spokesman for the Orange County Sheriff’s Department, Dorman was found dead in a vehicle on Friday morning and may have been on his way to a doctor’s appointment. RUSS B