Clever pick pocket ?

What are the odds of a pick pocket putting your wallet back in your jacket pocket, after stealing money from it, while the jacket hangs on the back of the restaurant chair with people in the restaurant and the waitor walking around ? My credit cards and drivers license were left in the wallet and nothing else was taken.
I have never come across this before, but this happend to me while out with a friend that I hadn’t seen for a while about two weeks ago. Expensive lesson yes ($150 taken), but a bit odd to put the wallet back in. Money was definitely in the wallet on entering the restaurant and I did leave the table for about 5 mins but my friend stayed at it. He said he saw noone at my jacket.