Which of the following is NOT a responsibility of FDNY personnel if illegal activity is suspected during a fire response?

When considering the responsibilities of FDNY personnel in situations where illegal activity is suspected during a fire response, it is crucial to understand the appropriate protocols that govern such encounters. Seizing all illegal items immediately is not a responsibility of FDNY personnel. Their primary role is to focus on fire suppression and life safety, while ensuring that the scene is safe. The responsibility for addressing illegal activities, including the seizure of illegal items, falls primarily to law enforcement.

On the other hand, documenting the discovery in a report is essential for maintaining accurate records of any findings related to the incident, which could be pertinent for future investigations. Informing a police officer at the scene is also critical, as it ensures that law enforcement is aware of potential legal violations and can take appropriate action. Finally, calling for backup if needed is a standard safety protocol, allowing for greater coordination among emergency responders and enhancing the safety of all personnel involved.

In summary, while firefighters play a vital role in fire response, their responsibilities do not include taking direct action against suspected illegal items, which is why the first choice is the correct answer.