I think you're working for Maddux and Caspar.
4 seconds sound clip from the Love's Lovely Counterfeit classic radio play.
You can hear this line at 00:10:23 in the radio play.
Quote context
[...]
- Sol Caspar is hiding them out at his hotel, Room Four Eighty.
- You have your people there at four o'clock. I'll take care of the rest.
- I think you're working for Maddux and Caspar.
- Well, that could be, but at least I know my law.
- The Castleton Bank is insured by the government. That makes the stick-up a federal rap.
- If you want the number of the FBI, I'll give it to ya.
[...]