Rare footage of Orlando nightclub gunman Omar Mateen has surfaced, in which the man who slaughtered 49 people runs his mouth while working as a security guard. Mateen was caught on hidden camera for a documentary working as a security guard in a 2012 documentary, "The Big Fix." The documentary is based on the notorious 2010 BP oil spill. Mateen is heard bad-mouthing the BP's cleanup efforts. The security company, G4S, has confirmed that it is in fact Mateen in the documentary. #InsideEdition
