An unwitting accomplice is someone who unknowingly helps another person commit a crime. In this case, the crossword solutions for the term are DUPE (4 letters), TOOL (4 letters), and PAWN (4 letters). A DUPE is someone who is easily deceived or tricked into doing something, a TOOL is someone who is used by another person to achieve their own ends, and a PAWN is someone who is manipulated by another person for their own gain.