Sonny Barger, the leather-clad figurehead of the notorious Hells Angels motorcycle club, has died. He was 83.

If you are reading this message, you'll know that I'm gone. I've asked that this note be posted immediately after my passing," a posting said.

I've lived a long and good life filled with adventure. And I've had the privilege to be part of an amazing club.

Barger's former attorney, Fritz Clapp, told The Associated Press that Barger had liver cancer and died Wednesday night at home in Livermore

California. Barger composed the post placed on the Facebook page managed by Barger's wife, Zorana, he said

Ralph "Sonny" Barger was a founding member of the Oakland, California, chapter of the Hells Angels in 1957 and was present at its most infamous moment

Rolling Stones concert at Altamont Speedway during which bikers hired as security staff fatally stabbed a concertgoer who pulled a gun on one of their members.

The Hells Angels were typically depicted by the media as the dark fringe of the 1960s counterculture, embracing freedom, drugs and rock music, but also crime and violence.

But Barger, the unofficial spokesman for the Hells Angels, downplayed their outlaw reputation.