As I said in my initial post, if he is "bragging" and self inflating, that would tend to downplay and cast doubt on his version of events...but I cannot say whether he has or has not been doing that.
If he was dismayed with the lack of action by a guard, and had to take action, unarmed, to try and stop a killer, I can understand how he would be frustrated. Speaking of that out of frsutration, or particularly out of a desire to help make sure it does not happen again, is not being a braggard. I m just not in a position to judge that part oof it at this point.
Maybe the church leadership is trying to avoid a lawsuit.