1. (noun) someone who helps another person commit a crime

• accessory

2. (adjective) aiding and abetting in a crime

• accessory

1. (noun) someone who helps another person commit a crime

• abetter
• abettor
• accessory after the fact
• accessory before the fact
• accessory during the fact
• collaborator
• confederate
• henchman
• partner in crime

1. (noun) someone who helps another person commit a crime

• criminal
• crook
• felon
• malefactor
• outlaw

1. (adjective) aiding and abetting in a crime

• supportive