The police arrest a man climbing over the wall of a cemetery after midnight. He claims that he is being blackmailed and is following instructions he received by mail to leave $1000 on a certain grave. It turns out that he's not the only one who got a blackmail letter from the same person--calling himself "The Black Panther"--and it also turns out that all the recipients are connected to an opera company.
Directed by William Beaudine
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Cast

Sidney Blackmer
Police Commissioner Thatcher Colt

Rick Vallin
Anthony 'Tony' Abbot (as Ricki Vallin)

Byron Foulger
Everett P. Digberry

Herbert Rawlinson
District Attorney Bill Dougherty
Lynn Starr
Miss Spencer

Barry Bernard
Capt. Edgar Walters / Frank Galloway
Trude Rosen
Nina Politza
Thornton Edwards
Enrico Lombardi

John Ince
Police Captain Mike Flynn

Martin Ashe
Officer Murphy

Walter James
Police Captain Tom Henry

Frank Darien
Samuel Wilkins
Joseph DeVillard
Antonio Spogucci (as Joseph M. De Villard)
Jacques Vanaire
Guiseppe Bartarelli (as Jack Vanaire)
Related

The Glass Key

The Quiller Memorandum

Indemnity

Grip of the Strangler

The Mirror Crack'd

The Scarlet Claw

Blackmail

Quicksand

Each Dawn I Die

Time Without Pity

Shadow of the Thin Man

The Young Savages

LaRoy, Texas

The Blue Gardenia

Song of the Thin Man

Maniac
