What is meant by "confidential informant" in law enforcement?

A "confidential informant" in law enforcement refers to a source that provides information to police or investigative agencies while maintaining their anonymity. This role is crucial in various investigations, as it allows law enforcement to obtain actionable intelligence on criminal activities without compromising the safety and security of the informant. The informant often has access to information not readily available to law enforcement and their confidentiality encourages more individuals to come forward with important details, sometimes regarding serious crimes like drug trafficking or gang activity.

The other choices pertain to different roles in the law enforcement or judicial process. A witness who relates events to the police is identified and does not maintain confidentiality. An officer preparing a case for prosecution is a part of the legal process but is not an informant. A victim providing testimony also does not operate under the premise of confidentiality as their identity and experience are typically known in the context of a legal case.