Answer:
Crime Scene Investigator (CSI)
Step-by-step explanation:
Crime Scene Investigators are responsible for protecting and gathering evidence at a crime scene.
Forensic Scientists work in a lab, they would not be present during crime scene.
Judges have nothing to do with this. Their responsibilities include determining the innocence of a person involved.
Like the forensic scientist, a Forensic Pathologist is another person who would be working in a lab. These are dead people doctors, and they are responsible for autopsies and determining cause of death via an autopsy.