I would think most perps use the same dialogue if it keeps working. Besides, this isn't MANY perps, this is a confined area (20 miles) and a confined time frame (86-89). Find me an instance where this phraseology was used around this area after this timeframe if it's used so often?
I would think that many perps who want to control their victim or get the victim "under control" or to do what they want would use the threat of a gun. Seems like the first logical thing to say" "Don't move or I'll shoot!"