I am not sure but I have heard somewhere that they do not need to carry guns.
Forensic psychologists work within the criminal justice system and consequently, work with criminals, victims and their families, judges and lawyers, jurors and law enforcement agents to name a few. Some forensic psychologists even operate their own private practices. Forensic psychologists carry guns.
No, they don't.
Well, knowing that forensic psychologist can have many roles I'd say it depends on the role they are playing.
For example, Forensic psychologists can work on research studies from their homes (which means no gun will be needed) but they can also work with crime investigation, criminals or work in prisons.. in which cases they would probably carry guns with themselves.