Question: Oscar "Zeta" Acosta, was an American attorney, politician, novelist and activist in the Chicano Movement,  in his novel "Fear and Loathing in Las Vegas", a novel by Hunter S. Thompson, illustrated by who?
Sentence (from "Oscar Zeta Acosta"): Acosta disappeared in 1974 during a trip in Mazatlan, Mexico, and is presumed dead.
Relevant evidence: No