- You stood there in the alley and killed him, didn't you?
- No, I didn't, and I don't know nothin' about it.
- Are you sure?
- Sure, I'm sure.

5 seconds sound clip from the Knock on Any Door movie soundboard.

You can hear this line at 01:27:23.638 in the Blu-ray version of the movie.

Quote context

[...]

- What are you trying to prove, Mr. Morton?

- It fits me, too. Am the killer?

- Was counsel for the defense in the neighborhood of the 380 bar the night officer Hawkins was killed?

- You're probably as tired as I am. Thanks for your Patience. I'm almost finished.

- Just a few more simple questions. For instance... Did you kill Hawkins?

- I didn't kill him.

- You stood there in the alley and killed him, didn't you?

- No, I didn't, and I don't know nothin' about it.

- Are you sure?

- Sure, I'm sure.

- I object! Your honor, the prosecution has been badgering this boy for hours, asking these same questions!

- Mr. Kerman, don't you think you've exhausted that method of approach?

- Very well, your honor.

- This is the gun you killed Hawkins with, isn't it?

- No, it's not my gun. And I didn't kill Hawkins.

[...]