BP's Busted Blowout Preventer Resurfaces, Investigation Begins 1.95K Jeff Neumann 09/05/10 11:13AM Filed to: evidence evidence oil spill crime scene Bp Disasters deepwater horizon blowouts Fbi Last night, the blowout preventer that failed to prevent the Gulf of Mexico oil spill, was retrieved and handed over to FBI investigators. Some documents suggest a dead battery in the device could be partially responsible for the leak.