wrongdoer

One who does wrong, especially morally or ethically.

One who does wrong, or commits wrongful or reprehensible acts; any offender against the moral law.

In law, one who commits a tort or trespass; a tort-feaser.

One who injures another, or who does wrong.

One who commits a tort or trespass; a trespasser; a tort feasor.

Someone who does wrong, either morally, ethically or in contravention of a law

a person who transgresses moral or civil law