Ever hear of Oscar “Zeta” Acosta? Maybe you know him better as Dr. Gonzo in Hunter S. Thompson’s 1971 book, Fear and Loathing in Las Vegas. In life, Acosta was a Mexican-American attorney, author and activist in the Chicano Movement in Southern California. Acosta wrote somewhat semi-autobiographical novels about himself, as well as appearing with Dr. Thompson.

Thompson wrote about him:

“Any combination of a 250 lb Mexican and LSD-25 is a potentially terminal menace for anything it can reach — but when the alleged Mexican is in fact a profoundly angry Chicano lawyer with no fear at all of anything that walks on less than three legs and a de facto suicidal conviction that he will die at the age of 33 — just like Jesus Christ — you have a serious piece of work on your hands.”

Acosta disappeared in Mexico in 1974 and is presumed dead.