Explanation
A. Criminal Mind: This term does not refer to an accomplice. It generally refers to the intent or mental state of a person who commits a crime.
B. Eye Witness: This term does not refer to an accomplice. It refers to a person who has seen a crime being committed and can provide testimony in court.
C. Partner In Crime:This is the correct definition of an accomplice. An accomplice is a person who assists or participates in the commission of a crime.
D. On Looker: This term does not refer to an accomplice. It generally refers to a person who is present at the scene of a crime but does not participate or assist in its commission.
So, the correct option is C: Partner In Crime.