The Monster Kills[1]) is a 1931 American pre-Code murder mystery whodunnit directed by Frank R.

[2] A murder during a game of charades at a society party leads the police to begin the hunt through the guest-list for a motive and culprit, involving a changed will and booby-trapped telephones.

The killer strikes several more times to conceal his or her identity, until all is revealed.

Footage from the film was re-used in The Mirror Crack'd (1980).

This article about a mystery film is a stub.