What is required in the suspect line up to ensure fairness?

In a suspect lineup, ensuring fairness is crucial to avoid misidentification. The correct requirement is that all individuals in the lineup share the same general characteristics. This includes similar age, race, gender, and other relevant features. By having all participants resemble each other to a reasonable degree, the possibility of a witness identifying a suspect based purely on distinguishing features is minimized. This promotes an unbiased selection process, focusing on the witness's memory and recognition rather than on obvious physical discrepancies.

Other options do not adequately address the fairness principle. Choosing at least one suspect does not guarantee fairness, as the standout individual could lead the witness to focus on that person alone. Requiring exact physical resemblance is impractical, as it may not be possible to find individuals who are identical in all aspects. Lastly, if a witness knows all involved, it could influence their identification process and compromise the integrity of the lineup. Thus, ensuring that all subjects have the same general characteristics is essential for a fair and reliable lineup.