James Cagney was an actor with plenty charisma, and this film is an evidence of it. He was always pleasant in any role, no matter if he was a gangster, a good man or a dancer, he performed all well and delivered enough smell for sympathy. The film had no a complicated plot, it was quite simple but still relevant for the society. Corruption of officials is very common, and what the film showed is what still exists. Certainly there are decent people who do not commit such mistakes, and Johnny 'Red' Cave (Cagney) was one of them, who was in charge of the bureau of weights and measures. He investigated several dark cases and succeeded to make them clear as well as finding out who were responsible for such misdeeds. However, knowing is not enough, it is necessary to make accusations with evidences to condemn those guilty, and that was what Johnny did. Probably today somebody like Johnny should use more sophisticated methods according to those used by those infringing the law. In any case, the film is good also to be watched for entertainment.