The last thing the bloke should have done was disclose his suspicions to the suspected thief prior to the arrival of the police because as we saw, matey boy then does a runner. Fortunately he was detained but he could have easily made good his escape.
Do USA thieves generally make such a poor attempt at running away?
He could have jumped a fence or something - like they do on "Police, Camera, Action" or suchlike.
It's almost as if he 'wanted' to be caught.
Maybe I'm getting too suspicious in my old age?