Phantom of 42nd Street

A policeman teams up with a drama critic to solve a mystery in this drama. They look into a case involving a wealthy, famous uncle who is killed backstage. His death destroys the Broadway debut of the uncle's niece whose father, also a very popular actor, becomes the prime suspect as the recently bankrupt fellow was in line to inherit the uncle's fortune. It is a complex case, but somehow the critic and the cop are able to sort through it all and reveal that the killer's identity.