Any "good" he has done is far outweighed by his past with the crips.
"In 1979, Williams and three accomplices got together to smoke some PCP and rob some local merchants in Whittier, CA. After unsuccessful attempts to rob a liquor store and a restaurant, the group robbed a 7-Eleven store at gunpoint.
"After ordering the clerk to his knees, Williams killed him with a gun shot to the head. He later laughed as he told his friends how the victim gurgled as he lay dying.
"Two weeks later, Williams murdered a motel owner, his wife and daughter during a robbery that netted $50."
http://www.cjlf.org/releases/05-04.htm