The crime being committed was the sale of stolen property. The sale could have been stopped by simply walking up and saying "Hey, those are my clubs, they were stolen this morning at ______ Golf Course" Crime stopped.
Use of deadly force to detain a thief, in this case a person attempting to sell stolen goods, is unreasonable, given the nature of the crime. The age or physical condition of the peace officer is no excuse to use excessive force. If he can't make the arrest using procedures appropriate to the crime, he shouldn't try. His duty is to take reasonable steps to apprehend, not any and all measures.
It seems this thread is coming to a stalemate, one where a group feels Mr. Acree was totally justified in pulling his weapon to detain a thief, and another group that believes he was out of bounds doing that. I'm going to make an effort to stop posting here, there just doesn't seem to be anything new to add until we hear more about the results of any prosecutions and/or firearm licensing reviews.