Which of the following is a common sign of potential criminal activity?

Suspicious behavior is a widely recognized indicator of potential criminal activity. This type of behavior often deviates from what is considered normal or expected in a given environment. Security officers are trained to identify these unusual actions as they may signal that someone is preparing to commit a crime or could already be engaged in illicit activity.

For example, someone who appears overly evasive, frequently looks over their shoulder, or is lingering in a location without a clear purpose can trigger a security officer's suspicion. This alertness allows officers to investigate further and potentially prevent a crime from occurring.

In contrast, observing traffic patterns, documenting safety measures, and patrolling regularly are important practices for maintaining security but do not directly indicate a likelihood of criminal activity on their own. They contribute to overall safety and awareness but do not serve as immediate red flags for potential wrongdoing.