What is done with the first responding officer

First responder — the officer who responds first to the scene — has the responsibility to protect the public and the crime scene and control the changes made to the crime scene to the best of their ability. ... To protect themselves and the citizens, it is important for the first responder to park away from the scene.

the united states presidential state car (nicknamed "the beast", "cadillac one", "first car"; code named "stagecoach") is the official state car of the president of the united states.