Which of the following is NOT a primary duty of a first responder at a crime scene?

The primary duties of a first responder at a crime scene focus on ensuring safety, preserving evidence, and documenting the scene for future investigation. Among these duties, prosecuting is not a responsibility of a first responder. Instead, the role of a first responder includes preserving the crime scene to prevent contamination, documenting observations and evidence that will support legal proceedings, and collecting evidence for analysis.

Prosecuting involves legal proceedings and is typically the role of attorneys within the criminal justice system, not first responders. Thus, recognizing the separation of roles within the law enforcement and legal process highlights why prosecuting does not belong in the list of primary duties for first responders at a crime scene.