Not just that. The Seal, on the roof of the CIA annex, "painted" a laser target. Either an armed drone was overhead or an AC130. They recalled or did not give the order to fire. To "paint" the target, the Seal had to stop firing the heavy machine gun. They are saying he would have never done that unless there was something there to shoot his target.
This is hours into the fire fight and after they escaped the consulate. The terrorists followed the team to the CIA annex, 1 mile from the consulate.