1) Bad person 2) Criminal 3) Culprit or lawbreaker 4) Guilty party 5) One subject to arrest 6) Perpetrator 7) Transgressor 8) Wrongdoer Found on https://www.crosswordclues.com/clue/offender
Of·fend'er noun One who offends; one who violates any law, divine or human; a wrongdoer. « I and my son Solomon shall be counted offenders .» 1 Kings i. 21. Found on http://www.encyclo.co.uk/webster/O/13
A person who has been convicted of an offense or who has been adjudged to have committed an act of juvenile delinquency. 18 USC Found on http://www.lectlaw.com/def2/o006.htm
Any adult or juvenile who has been subject to any stage of the criminal justice process for whom services under this Act may be beneficial or who requires assistance in overcoming artificial barriers to employment resulting from a record of arrest or conviction. Found on https://www.osha.gov/dts/osta/oshasoft/index.html