Rubber rationing was obviously big news in 1942, the subject was also covered in Rubber Racketeers.
Eddie is helped by a fascinating plot device, a telephone linked jukebox where operators play records on request. Linda (Helen Parrish) is the operator whom Eddie has the hots for and who ends helping him with his investigation... one made more difficult when Eddie is accused of killing one of the gangsters. Someone else is involved... there isn't a great deal of investigation though. Various suspects get gunned down with regularity until the real culprit is basically revealed through being the last person standing.
But what a great film, cheap but definitely cheerful.
