Question: When did the criminal gang formed by someone serving six life sentences at the ADX Florence supermax prison in Colorado?
Sentence (from "Gangster Disciples"): The Gangster Disciples are a criminal gang which was formed on the South-side of Chicago in the late 1960s, by Larry Hoover, leader of the High Life Supreme Gangsters, and David Barksdale, leader of the Black Disciples.
Relevant evidence: Yes