Physically attacking a person.
Someone who murders
Murderer
Stealing from a person or a place
Steal
Someone who kidnaps
Kidnaper
Killing someone illegally and on purpose.
Murder
Someone who takes possession of a plane, ship or vehicle
Hijacker
Giving money to gain something illegal/dishonest
Bribe
Someone who steals
Thief
Using violence to take control of a plane, ship or vehicle.
Hijack
Someone who asks for money in change of not telling a secret
Blackmailer
Taking a person by force and demanding money for releasing them.
Kidnap
Someone who accepts bribes
Crook
Stealing from a shop.
Shoplifting
Someone who assaults
attacker
Illegally copying a document, signature, painting, money etc.
Forge
Someone who smuggles objects
Smuggler
Demanding money from someone in return for not telling a secret.
Blackmail
Shoplifter
Bringing goods or people into a country (or taking them out) illegally.
Smuggle
Forger