- You're crazy. She wasn't even on the train.
- I know she wasn't.

5 seconds sound clip from the Double Indemnity movie soundboard.

You can hear this line at 01:11:49 in the DVD version of the movie.

Quote context

[...]

- Murder?

- Don't you have any peppermint or something?

- Sorry. Want a little soda water?

- No, no, no.

- Who do you suspect?

- Maybe I like to make things easy for myself. But I always tend to suspect the beneficiary.

- You mean the wife?

- Yeah. That wide-eyed dame that just didn't know anything about anything.

- You're crazy. She wasn't even on the train.

- I know she wasn't.

- I don't claim to know how it was worked, or who worked it but all I know is that it was worked.

- I've got to get to a drugstore. This thing feels like a hunk of concrete inside me.

- Good night, Walter.

- Good night, Keyes.

[...]