I? Certainly not! I don't know anything about it!
5 seconds sound clip from the The Thin Man (1936) classic radio play.
You can hear this line at 00:20:49 in the radio play.
Quote context
[...]
- Oh, I know he didn't, but I wish I could find him. I have something very important to tell him.
- Macaulay won't help at all. He thinks I just want money.
- Oh Nick, you're always teasing.
- Were you alone when you found Julia Wolf?
- Wasn't Mr. Jorgensen with you?
- I? Certainly not! I don't know anything about it!
- The first word I had that Julia Wolf was dead was when Mrs. Wynant called me at my club.
- Yes.
- Why?
- Oh, let's not even talk about it.
[...]