Parole Racket (1937)

Following a long investigation Police DetectiveLieutenant Anthony Tony Roberts becomes convinced that there is some powerful unknownmastermind leader behind the gangs of crooks who are terrorizing the city and it has something to do with paroled convicts He sets up a scheme with his supervisor to have himself shamed by being demoted to a patrolman and then caught in the act of receiving bribemoney from a racketeer He is convicted and sent to prison and the manner in which his parole is arranged leads him dangerously to the secrethead of the gang