Pocket thief

We are still in Rome. We already knew that we have to be very careful of our wallet in our trip in Europe. We caught the Metro in rush hour this am on our way to the Colosseo. The train was pretty packed when everyone tried to catch the train. The doors closed, and an american guy in our next door entrance shouted out "someone just stole my wallet". The cart is still full of people, but he pointed at a girl and said "give me my wallet back". The gal ignored him at first, but everyone were looking at them. The guy shouted again "give me my wallet back right now! POLIZIA! POLIZIA!". The gal throw his wallet on the ground, he picked up and checked nothing got taken out. At the same time, the train arrived at the next station, the gal got off the train with her partner who carried a backbag. I'm sure her friend is her receiver, yet the guy were very cautious and he actually felt his wallet came out of his pant's front pocket and he's lucky that he can get it back. After this incident, we are super highly suspicious of everyone. Everybody is a THIEF.