Body camera footage released from the Butler, Pennsylvania, police department includes an officer saying that he had warned the Secret Service four days before former President Donald Trump’s rally on July 13 about the danger posed by the building the would-be assassin used. CNN, which secured the footage via a public records information request, reported that an officer told colleagues 10 minutes after the shooting that he had told the Secret Service to post law enforcement by the building. “I f***ing told them, they need to post the guys f***ing over here,” the officer said. “I told them tha…