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.
Director
William Beaudine
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
Barry Bernard
Capt. Edgar Walters / Frank Galloway
John Ince
Police Captain Mike Flynn
Martin Ashe
Officer Murphy
Walter James
Police Captain Tom Henry
Frank Darien
Samuel Wilkins
Willy Castello
John Martin George (as William Castello)
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