What is the primary function of surveillance in law enforcement?

The primary function of surveillance in law enforcement is to gather evidence for trial. This aspect of surveillance is essential because it allows law enforcement officers to monitor suspects and collect information that can be used in court. Effective surveillance can yield critical details, such as witness statements, recordings, or documents, which support the prosecution's case. Additionally, thorough documentation acquired through surveillance can help establish a timeline of events, corroborate testimonies, and strengthen the overall case presented in a trial setting.

Although maintaining public order, overseeing law enforcement agencies, and investigating potential terrorist activities are relevant functions in the broader context of law enforcement, they do not capture the fundamental purpose of surveillance. Surveillance focuses specifically on monitoring activities to collect reliable and admissible evidence that can be brought forth in judicial proceedings.