Which of the following is NOT typically part of an unarmed security officer's job?

Investigating serious crimes is not typically a part of an unarmed security officer's job. The role of an unarmed security officer primarily focuses on maintaining safety and order within a given environment, often through a visible presence that deters criminal behavior and provides reassurance to patrons and staff.

Key responsibilities include providing a safe environment for guests by monitoring activities and responding to incidents as they arise. Additionally, their duties often involve deterring criminal activity through proactive measures, such as patrolling areas and being vigilant for suspicious behavior. Unarmed security officers typically also monitor entrances and exits, ensuring that only authorized individuals access certain areas, and frequently checking for compliance with safety policies.

In contrast, investigating serious crimes usually falls under the jurisdiction of law enforcement agencies, which possess the legal authority and resources to conduct in-depth investigations, gather evidence, and make arrests. Unarmed security officers may report incidents to the police or assist with initial observations, but they do not conduct investigations themselves, which differentiates their duties from those of law enforcement officials.