GUILTY: Having committed an offense, crime, violation, or wrong, esp. Against morals or Against the law; culpable.
MUGGER: A person who mugs, esp. One who assaults a person in order to rob him or her.
CON ARTIST: A person adept at lying, cajolery, or glib self-serving talk.
PICKPOCKET: One who steals from the pockets of people, as in a crowded public place.
SHOPLIFTER: One who steals goods from a retail store while posing as a customer.