District Judge Carl Barbier in New Orleans, Louisiana, who held a trial without a jury last year to determine who was responsible for the April 20, 2010 rig explosion and spill that killed 11 workers and spewed oil for nearly three months onto the shorelines of several states. Barbier ruled that BP was mostly at fault and that two other companies in the case, Transocean Ltd (RIG.N) and Halliburton (HAL.N), were not as much to blame.