Incidentally, he was most likely shot by his own side. Four feds go up the ladder, one of them literally shoots himself in the foot on the way up (did he know what was coming and wanted no part in it?) and comes back down. Two others breach the room, the agent behind them immediately throws a grenade in after them and starts spraying the room with his SMG. Fire is returned and he collapses onto the roof. Allegedly the two guys who entered the room were the clintons' bodyguards from their presidential campaign.