malfeasor

Example:The offender was given a hefty fine for breaking several traffic laws.

Definition:A person who has committed an illegal act or who has violated a rule, law, or obligation.

Example:He was the culprit behind the arson that destroyed the historic building.

Definition:A person who does or causes something wrong, especially a crime or a mistake.

Example:The wrongdoer was caught and charged with fraud.

Definition:A person who commits a wrong or criminal act.