Question: John Clay Walker was murdered by members of the Guadalajara Cartel under orders of their leader that was born in what year?
Sentence (from "John Clay Walker"): John Clay Walker (October 5, 1948 - January 30, 1985) was an American journalist and aspiring novelist who was abducted, tortured and murdered in Mexico by members of the Guadalajara Cartel under orders of their leader Rafael Caro Quintero.
Relevant evidence: Yes