Well, police in Pennsylvania report nabbing a robber who returned to the scene of the crime to look for his lost keys.
According authorities, 19-year-old Cordell Kelly attacked a woman for her designer purse.
Investigators at the scene found a keychain that had Kelly's address on it.
An officer waited in an unmarked car.
Police say Kelly showed up and was busted.
Police officials in Upper Darby tell a local newspaper that they also found the missing purse in Kelly's house.