Warning: The video in this article is disturbing.A witness at former President Donald Trump's rally shared a video of what appears to be a body on a roof near the Butler Farm Show grounds."You can see the guy down. I think they hit him because the guy — he looks dead," a voice can be heard saying in the footage.Sister station WTAE has blurred the graphic video. It was later confirmed by the Secret Service the shooter was "neutralized" by agents who were at the rally. Trump had been on stage for the rally less than ten minutes when multiple shots were fired by an unidentified shooter. The Secret Service released a statement saying that the shooter was firing a gun from an elevated position outside the rally venue."U.S. Secret Service quickly responded with protective measures, and former President Trump is safe," Chief of Communications for the U.S. Secret Service Anthony Guglielmi said.It is confirmed a rally attendee was killed, and two others were critically injured.The Federal Bureau of Investigations has taken over the assassination attempt investigation.