What is a key characteristic of a line-up identification procedure?

A key characteristic of a line-up identification procedure is that the victim identifies the suspect from a group of individuals. This procedure involves presenting multiple individuals, including one or more potential suspects, to the witness or victim, allowing them to make an identification decision based on visual recognition. The aim is to provide an opportunity for the witness to confirm or deny whether someone in the line-up committed the crime, which is critical to ensuring the reliability of witness testimony and helping law enforcement in their investigations.

This process contrasts with other options, where a police officer confirming the suspect's identity lacks the direct involvement of the victim and does not adhere to the principles of an impartial identification procedure. Additionally, displaying the suspect individually does not constitute a line-up, as it deviates from the standard format where a comparison is made among multiple individuals to assist the witness effectively. Finally, conducting the lineup in private reflects procedural privacy but does not define the distinct characteristic of a line-up, which is fundamentally about the communal comparison of potential suspects.