- And I wanted you to find out who did it.
- Maybe I will.

5 seconds sound clip from the The Thin Man (1936) classic radio play.

You can hear this line at 00:30:13 in the radio play.

Quote context

[...]

- Oh, well, well... it's no use thinking about it now.

- I'm sorry to have wasted so much of your time. You'll excuse me, won't you?

- Of course.

- Goodbye.

- Bye.

- Well, that's that.

- What's the matter with you?

- The mystery's all gone.

- And I wanted you to find out who did it.

- Maybe I will.

- But Wynant...

- I don't believe he did it.

- Why don't you?

- No reason. Just a hunch. But I'm going to find out.

- Come on, Dr. Watson, we're going places. I want to talk to Inspector Guild.

- Man to man, Mr. Charles, are you working on this case?

- Man to man, I'm not.

- But he's interested!

[...]