Feds Grab BP's Blowout Preventer Evidence ferried to NASA facility for examination By Mary Papenfuss, Newser User Posted Sep 6, 2010 4:55 AM CDT 3 comments Comments The blowout preventer that failed to stop oil from spewing into the Gulf of Mexico was raised to the surface yesterday. (AP Photo/BP PLC) (Newser) – No sooner had BP raised the device that was supposed to prevent an oil well blowout in the Gulf of Mexico than the US Coast Guard took possession of it yesterday. The blowout preventer will be a key piece of evidence in the US probe into what went wrong in the Deepwater Horizon oil spill disaster. The 350 ton, 5-story-tall device was hoisted into a metal contraption with FBI agents standing by, and it is now under constant guard, reports the Telegraph. It will be ferried to a NASA facility in Louisiana for examination, according to AP.