Answer: Forensic Investigator
Step-by-step explanation:
Forensic investigator is the expert who can give his opinion after searching, collecting and analyzing a physical evidences such as chemical, fingerprint, blood or even dead body found at the scene of crime in the court of law.
A forensic investigator can be specialized in the field of chemistry can be a chemical expert. Such an expert can give collect chemical evidences such as drugs, medicines, used syringe, poison obtain from crime scene also can give idea the death occurred due to intoxication by the analysis of blood, urine, hair and viscera obtain after autopsy.