Stanley Tookie Williams executed Crips gang co-founder put to death for 4 murders Tuesday, December 13, 2005; Posted: 3:38 a.m. EST (08:38 GMT) SAN QUENTIN, California (CNN) -- Convicted killer and Crips gang co-founder Stanley Tookie Williams was executed early Tuesday at the California state prison at San Quentin. The execution went ahead as scheduled after the U.S. Supreme Court late Monday rejected a last-ditch appeal. The high court's ruling followed California Gov. Arnold Schwarzenegger's decision to deny clemency for Williams, 51, who received a lethal injection at 12:01 a.m. Tuesday (3:01 a.m. ET).