The Untouchables S03E08 - Man Killer

Eliot Ness and his men are having success shutting down the narcotics trade in Chicago thanks to a series of anonymous telephone tips. Ness manages to trace the call to a phone booth and identify the caller as Nick Dulov, owner of the Windy City cab company. Dulov has stolen Nitti's 15 kilo shipment of heroin and then gives it back to him - with a proposition that they go into the narcotics distribution business together.