From left, U.S. Attorney General Eric Holder, Assistant Attorney General for the Environment and Natural Resources Division Ignacia Moreno, Assistant Attorney General, Civil Division Tony West and U.S. Attorney for the Southern District of Mississippi Don Burkhalter announce that the Justice Department has launched a criminal investigation into the BP oil spill in the Gulf of Mexico, in New Orleans, Tuesday, June 1, 2010. (AP Photo/Cheryl Gerber)