- How come a nice guy like you is a cop?
- Just lucky, I guess.

5 seconds sound clip from the The Big Combo (1955) movie soundboard.

You can hear this line at 00:44:37.414 in the Blu-ray version of the movie.

Quote context

[...]

- Seven years I don't talk to nobody, now I talk too much.

- You'll have to come with me, Mr. Bettini.

- You're locking me up?

- The next stranger who comes in... won't be from the police. You'll be safer with us.

- You better... pack your things.

- I got them all on me. Except this.

- How come a nice guy like you is a cop?

- Just lucky, I guess.

- You like antiques, Officer?

- Who can afford them?

- If you're a captain on a boat borne for Portugal, and you keep your mouth shut, you can buy a lot of antiques. Maybe a whole store full.

- Yes, my love. That is what I've been telling you for the last five minutes, but you don't listen.

- Well, be calm, we can change our plans.

[...]