Final answer:
The first step done by a forensic examiner who arrives at a crime scene is to take photographs.
Step-by-step explanation:
The first step done by a forensic examiner who arrives at a crime scene is to take photographs. Taking photographs at the crime scene is crucial to document the initial condition of the scene and preserve evidence. The photographs should capture the overall scene, close-up shots of specific areas, and any potential evidence that may be present. This visual documentation helps in reconstructing the scene and maintaining an accurate record of the evidence.