Which type of informant includes individuals such as bank employees or airport staff?

The correct answer is non-criminal informants. These individuals, such as bank employees or airport staff, typically do not have a criminal background and are often considered reputable members of society. They provide information based on their professional roles and observations, which can be extremely valuable in criminal investigations.

For instance, bank employees might notice suspicious transactions that could indicate financial crimes, while airport staff might observe unusual behavior that raises security concerns. Their perspective is often unbiased, as they are not involved in criminal activities themselves, making their information more reliable and useful for law enforcement.

In contrast, criminal informants usually have a history of criminal behavior and may provide information as part of a plea deal or for personal gain. Restricted informants might have limited information or be bound by confidentiality agreements, while undercover informants are individuals who engage in criminal activities to gather intelligence. These roles differ significantly from those of non-criminal informants, who can serve as credible sources without any criminal involvement.