1. When attending a fire scene, first seek advice from the fire service and turn off electricity and gas. Never enter alone due to risks of falling debris. 2. At a crime scene, consider risks from damaged asbestos, weakened surfaces, violence, and bodily fluids. Wear appropriate personal protective equipment (PPE) like gloves, goggles, and masks. 3. A risk assessment is required to safely investigate a crime scene. Consider risks from sharps, fuels, dust explosions, and hazardous chemicals and take appropriate precautions.