A policeman doubles as a gunman to get in with the mob.
Little Caesar
1931
Each Dawn I Die
1939
The Asphalt Jungle
1950
The Racket
1951
Plunder Road
1957
The Wrong Man
1956
The Roaring Twenties
Dead End
1937
The Interview
1998
The Glass Key
1942
The FBI Story
1959
The Big Combo
1955
'G' Men
1935
The Unholy Three
1925
5 Against the House
The Enforcer
T-Men
1947
The Public Enemy
The Quiller Memorandum
1966
Pushover
1954
