Lee Dorman's cause of death is believed to be from natural causes, according to the Orange County Coroner's Office, as the rock star had a history of heart problems.
OC Sheriff deputies say Lee Dorman was found dead in his car without any evident signs of foul play, nor were any drugs or paraphernalia found, reportedly.
Douglas Lee Dorman was born on September 15, 1942 in St. Louis, Missouri, and moved to Southern California in the 1960s to make it in the music business.
In 1967, Lee Dorman joined the acid rock band Iron Butterfly in Los Angeles and recorded the band's megahit album, In-A-Gadda-Da-Vida, which has sold a staggering 31 million copies and counting.
The album is historically significant as the very first album ever to be awarded Platinum status.
The epic 17-minute title track, "In-A-Gadda-Da-Vida," is one of the most recognizable musical anthems in history.
The song would not have been as successful without Lee Dorman's hypnotic, iconic bass line by which the song is immediately recognized. That is a rare status for a bass player to hold, as most musicians know.