1969- Steve was a member of Manson Family. He went on trial for the murder of Shorty Shea and was convicted and originally sentenced to death, but on December 23, 1971, a judge had compassion for Steve and changed the sentence to life imprisonment, stating "Grogan was too stupid and too hopped up on drugs to decide anything on his own."
During the days when Grogan hung around with Beach Boy Dennis Wilson, he crashed Wilson's uninsured Ferrari while racing through Santa Susana Pass just up from Spahn's Ranch. Grogan was convicted along with Bruce Davis and Charles Manson of the 1969 murder of Spahn Movie Ranch hand Donald "Shorty" Shea.
While in prison Steve gave information to authorities on where to find Shorty Shea's body that was still at the time buried at Spahn's Ranch. They went and dug Shorty up and on November 18, 1985 Steve was released from prison and to date he is the only Manson family member convicted of murder to be released from prison.
Steve Grogan has played alongside notable jazz musicians Rex Hall, Mitch Woods, Dan Hicks, Dave Bell and the Grateful Dead's Bob Weir. He is a master of many stringed instruments including the banjo, dobro, guitarist, and mandolin. He has played in several bands including Mitch Woods and His Rocket 88's, Rhythm town Jive, The Christmas Jug band and Those Damn Accordions!.