Mobs Inc (1956)

Captain Braddock of the Los Angeles Racket Squad schools a group of cadet policemen by telling them of three precarious and dangerous cases of con artistry Included are tracking down a dance hall girl who together with a big operative are thwarted in attempting a robbery a racketeer fleecing a book publisher on a TransAtlantic voyage and the tripping up of the plans of a phony land syndicate