1952 Perry Mason

The Case of the Grinning Gorilla

Client Helen Cadmus
Victim Benjamin Addicks
Prosecution Hamilton Burger
Investigator Paul Drake / Lt. Arthur Tragg

Case Narrative & Plot Summary

An eccentric researcher studying gorilla hypnosis and behavioral psychology dies in his study, leaving a caged ape as the alleged murderer.

Courtroom Cross-Examination & Forensic Trick

Mason uses primate anatomical reflexes and grip strength metrics to prove a human killer operated the cage.