On November 15, 2012, Breuer and Attorney General Holder jointly announced the largest criminal resolution in history in connection with the April 20, 2010 Deepwater Horizon oil rig explosion. As part of the resolution, BP agreed to plead guilty to 11 felony manslaughter charges, environmental crimes, and obstruction of Congress, and to pay $4 billion in criminal fines and penalties. In addition to resolving charges against the corporation, the two highest-ranking supervisors on board the Deepwater Horizon were charged with manslaughter, and a former BP executive was charged with obstruction of Congress and making false statements.