Had he not offed himself and continued shooting, they might have rushed the door.
However, there was no shooting, they didn't know he was dead and had to be concerned that he might try to make a run for it in which case they needed to stay put with weapons trained on the doors.
After a certain amount of time they figure he isn't coming out and since there hasn't been any shooting for some time, he is either dead, or still alive with his hand on a bomb trigger waiting for them to enter the room, or he is dead and the room is booby trapped.
How did they know he would not start shooting. Please answer that. Terrible delay. I would the whole lot of them and the commander on TV!!