What do you call someone who studies criminals and killers?

Answer 1

a criminal psychologist or a forensic psychologist.

Added: . . . or a CRIMINOLOGIST.

Forensic Biologists

Forensic Anthropologists(Identification.)

Forensic Botanists (Leaves, Seeds and Plants)

Forensic Odontologits (Teeth- Dental Records)

Forensic Entomologists (Insects and Arthropods)

Forensic Ostiologists (The Causes and Circumstances of a death.)

Forensic Pathologist (Studies Cause Of Death)

Criminal Phsycologust (Studied Criminology- Liek a Phsyciactrist in some ways)

Answer 2

A criminologist.