Armored car robbery (1950)

Dave Purvis has pulled off an armored-car robbery with engineering precision, and has a few details to tend to before boarding a chartered airplane to take him to a life of ease and comfort. First he shoots a wounded gang-member whose wife he is bedding, tosses another one to the police, and betrays a third and is nearly home free. However, Los Angeles Police Lieutenant Jim Cordell, using his brain and playing hunches, and making use of the police department's scientific network of laboratory, switchboard, radio-patrol cars, wire-tapping, and recording devices, is closing in on him quickly.