What term describes a person who assists a shoplifter in a theft?

The term that accurately describes a person who assists a shoplifter in a theft is "accomplice." An accomplice is someone who helps or facilitates the commission of a crime, which in this context refers to theft. This assistance can take various forms, such as providing support, distraction, or direct involvement in the act of shoplifting. The involvement of an accomplice contributes to the overall crime and can lead to legal consequences for both the shoplifter and the person assisting.

In contrast, the other terms suggest relationships that do not necessarily carry legal implications regarding criminal activity. For example, an associate or acquaintance refers to a connection or relationship, often without the context of wrongdoing. A companion may simply denote someone who is with another person, without any involvement in illegal activities. Thus, "accomplice" is the specific term that captures the role of someone involved in aiding a shoplifting incident.