Look, mister, you're wrong. I don't know what you're talking about.
3 seconds sound clip from the Shockproof (1949) movie soundboard.
You can hear this line at 01:05:23.225 in the Blu-ray version of the movie.
Quote context
[...]
- Look, give me 50 bucks, and let's stop all this.
- I don't want to sell it. Give me the watch.
- Get your hands up! Get your hands up!
- I recognised you the minute you came in. Don't try anything funny. The police are on their way over.
- Look, mister, you're wrong. I don't know what you're talking about.
- Look, you keep the watch. I found it. Just let me out of here.
- Don't move! Stay where you are! I'm warning you!
- You're this guy Marat, the guy with the murderess!
- Oh, no. It's a basketball trophy.
[...]