What is a key sign of potential criminal activity?

The correct answer highlights specific behaviors that can indicate potential criminal activity. When individuals are observed loitering, looking around suspiciously, or attempting to conceal items, they may be engaging in actions that suggest a preparedness to commit a crime or are already involved in illicit activities. These behaviors are often associated with individuals who may be assessing their surroundings for opportunities to engage in theft, vandalism, or other criminal acts.

In contrast, individuals dressed in formal attire typically do not raise concern, as they are often associated with legitimate activities or events. Friendly conversations among people usually indicate social interaction and do not suggest criminal intent. Similarly, individuals leaving a property without any items usually imply that they have not taken anything, suggesting a lack of criminal involvement. Therefore, the behaviors mentioned in the correct answer serve as critical indicators for security officers to note and assess further for possible threats to safety and security.