Find the Blackmailer(1943)
OVERVIEW
A private eye is hired by a mayoral candidate to prevent any sort of adverse publicity. It seems that, somewhere in town, there's a talking blackbird who insists upon saying that the candidate will commit a murder. When the killing occurs, the candidate is implicated, and the detective is off on a hectic pursuit of the incriminating crow and the actual murderer.
TAGLINE:
THE TALKING BLACKBIRD KNOWS THE SECRETS OF THE "SHAKEDOWN MURDERS"...But He Won't Talk!