What Is a Show-Up?

What a Show-Up Generally Means

A show-up is, generally speaking, an identification procedure in which a witness is presented with a single individual and asked whether that person is the one they associate with a particular event. Unlike procedures that present several people at once, a show-up focuses the witness's attention on one person alone.

Show-ups can occur in a variety of settings and at different points in an investigation. They may take place near the scene of an event, at a police station, in a hospital setting, or through other arrangements depending on the circumstances. The timing and manner in which a show-up is conducted can vary considerably across jurisdictions and from case to case.

Because the specific rules and practices surrounding show-ups differ by jurisdiction, there is no single uniform procedure that applies everywhere. Courts and legal commentators have discussed how local rules, constitutional standards, and departmental policies all shape the way identification procedures of this kind are carried out and later reviewed.

How It Differs From a Lineup

The most commonly discussed distinction between a show-up and a lineup is the number of individuals presented to the witness. A lineup — whether conducted in person or through photographs — generally presents multiple people simultaneously or sequentially, so that the witness must select, if anyone, from among several options.

A show-up presents only one person. This structural difference is often considered significant in legal and research discussions, because it removes the comparative element that a lineup provides. Whether a witness is able to make a meaningful comparison depends partly on how many options they are shown.

A lineup is a related but distinct identification procedure, and understanding the differences between the two can provide useful context for anyone seeking to learn more about how identification evidence is generally gathered.

Why Suggestiveness Can Be a Concern

Courts and researchers have long discussed the concept of suggestiveness in the context of identification procedures. Because a show-up presents only one person, some observers have noted that it may be more suggestive than a procedure in which several people are presented — the witness sees one individual and is, in essence, being asked whether that particular person is the one they recall.

The concern is that the structure of the procedure itself may, in some circumstances, convey an implicit message to the witness about whom investigators believe is involved. Courts have grappled with questions about when, and under what conditions, the suggestive character of a show-up becomes legally significant. These questions have not been resolved in the same way across all jurisdictions.

Legal systems generally provide mechanisms for examining whether an identification procedure was conducted in a way that may have affected its reliability. This examination often takes place within the broader framework of due process protections, which vary in their application depending on the jurisdiction and the specific facts at issue.

It is worth noting that courts have not uniformly concluded that show-ups are impermissible or unreliable. The legal discussion tends to focus on the specific circumstances of a given procedure — factors such as how it was conducted, what instructions were given, and what the surrounding context was — rather than on categorical rules.

It Generally Produces an Eyewitness Identification

When a witness responds to a show-up by identifying the person presented, the result is generally characterized as an eyewitness identification. Eyewitness identification is one category of evidence that can arise in criminal proceedings, and it has been the subject of substantial legal and scientific discussion regarding how accurate and reliable such identifications can be under various conditions.

The connection between show-ups and eyewitness identification means that the broader body of discussion about eyewitness evidence is often relevant when a show-up identification is at issue. Questions about memory, perception, and the conditions under which a witness observed an event can all bear on how an identification made during a show-up is later evaluated.

For a broader overview of how eyewitness identifications arise and the kinds of questions that surround them, see the related guide on eyewitness identification.

How Concerns Can Be Raised

Legal systems generally provide avenues through which concerns about identification procedures can be examined. Whether and how such concerns become part of a proceeding depends on the specific facts, the jurisdiction, and the procedural posture of the case.

One context in which identification-related concerns are often examined is a hearing focused on whether particular evidence should be admitted or excluded. A suppression hearing is one procedural mechanism through which questions about the admissibility of evidence — including identification evidence — can be raised and considered by a court. The availability and outcome of such hearings vary considerably depending on the circumstances.

It can also be useful to understand the range of identification procedures that exist. A photo array is another type of identification procedure — one that presents multiple photographs rather than a single individual — and understanding how it differs from a show-up can provide useful context for evaluating any particular identification.

None of this constitutes a prediction about how concerns will be resolved in any particular case. The legal standards that govern identification procedures, and the weight given to concerns about suggestiveness, vary across jurisdictions and depend heavily on the specific facts involved.

Questions to Explore About a Show-Up

When a show-up is part of a case, there are a number of conceptual questions that courts and commentators have considered relevant to evaluating the procedure. Some people find it useful to ask questions like these when trying to understand what happened and what issues may be worth exploring further.

1. What were the general conditions under which the show-up took place — such as the setting, the time elapsed since the relevant event, and the instructions given to the witness — and how might those conditions bear on the procedure's characteristics?
2. Was the witness informed, before or during the show-up, of anything that might have conveyed information about whom investigators were focusing on, and how do courts in the relevant jurisdiction treat that kind of information?
3. What is the jurisdiction's legal framework for evaluating whether an identification procedure was conducted in a way that could have affected the witness's response, and what standards generally govern how those questions are raised?
4. How does a show-up identification relate to other evidence in the case, and in what ways might the identification evidence be corroborated or called into question by other facts?
5. What procedural mechanisms are generally available in the relevant jurisdiction for raising questions about identification procedures, and at what stage of a proceeding are those mechanisms typically invoked?