What is the appropriate protocol for arriving at a crime scene?

Preserving the scene and ensuring personal safety are critical first steps upon arriving at a crime scene. The primary concern should always be the safety of the security personnel and any potential witnesses, as there may still be ongoing danger or risks related to the situation. Maintaining the integrity of the scene is essential to prevent contamination or alteration of evidence, which can be crucial for any investigation that follows.

By taking these measures first, security personnel can effectively protect evidence while also ensuring that no further harm comes to themselves or others. This is foundational for any subsequent investigative processes carried out by law enforcement.

The other options do not align with proper protocol. For example, immediately starting to collect evidence without securing the scene could compromise its integrity. Gathering a crowd is not advisable, as it may hinder police work and create confusion or chaos at a scene where calm and order are needed. Simply securing the area and leaving is insufficient; active steps must be taken to keep the scene safe and preserved until authorities arrive.