What is the first person that arrives at the crime scene known as? first responder initial officer first pos (person on scene) initial collector?

The first person that arrives at the crime scene is known as first responder.

A first responder is a trained personnel that responds or arrives first at the crime scene. The duty of a first responder is to protect the people and the crime scene and also to regulate the changes that affected the crime scene. First responders usually include police officers, paramedics, rescuers and emergency medical technicians.

c. taught scientists many new things about the earth, but not other planets.

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