Former president Luiz Inacio Lula da Silva, front runner in Brazil’s October presidential elections, was given 24 hours on Thursday to surrender to police and start a 12-year prison sentence for corruption. The timing of the order from Judge Sergio Moro, head of Brazil’s huge “Car Wash” anti-graft probe, took Lula’s lawyers by complete surprise. They had been expecting to use legal maneuvers to delay the start of prison at least until next week.