In the scene at the shack, Lt.Tragg can be seen talking into his flashlight and not his walkie-talkie.
Trivia: This is the only time that Perry Mason shared the screen with the one filling in for him. He only spoke to the others through the phone.
Trivia: When Dick Wilson is in the cell next to Michael Parks, he is reading a comic book called Penalty!. Originally titled Crime Must Pay the Penalty, this comic book began in 1948 and ended in the early 60s under the new title Penalty!.
Trivia: The real name of the murderer is never given.