This lively
Rin Tin Tin drama throws in everything but the kitchen sink. This time Rinty finds himself on the site of a dam project, where the villains intend to destroy the huge structure for their own gain. Our canine hero not only prevents the sabotaging of the dam but also participates in a thrilling train chase. In the excitement of completing the picture, the filmmakers evidently forgot that the title was Tracked by the Police, inasmuch as there wasn't a single policeman in the entire story! Perhaps as compensation, a closing title was hastily inserted, claiming that, because of his courage and tenacity in bringing the criminals to heel,
Rin Tin Tin was appointed an honorary policeman -- thus, the villains were indeed "tracked by the police." ~ Hal Erickson, All Movie Guide