I remember one time I was waiting tables and watched one of my customers walk by another table and snatch a co-worker's tip. I confronted him when he sat back down, simply asking for the money. The guy was a jacka$$ about it so I had the manager throw him out even after he gave the money back.
I can just imagine Scotty's argument here ...
Me: Give the money back.
Scotty: Prove I took it.
Me: I saw you take it.
Scotty: Well it's your word against my documentation. See the money is in my wallet. That proves I didn't do anything wrong.
Me: