High Quality Content by WIKIPEDIA articles! George Lester Jackson (September 23, 1941 – August 21, 1971) was an American convict who became a left-wing activist, Marxist, author, a member of the Black Panther Party, and co-founder of the Black Guerrilla Family prison gang. Jackson achieved fame as one of the Soledad Brothers and was later shot to death by prison guards in San Quentin Prison during an escape attempt.