accomplice
US /əˈkɑːm.plɪs/
UK /əˈkɑːm.plɪs/

1.
complice
a person who helps another commit a crime or do something wrong
:
•
The police arrested the thief and his accomplice.
La polizia ha arrestato il ladro e il suo complice.
•
She was charged as an accomplice in the fraud case.
È stata accusata come complice nel caso di frode.