Wynant was supposed to be on a trip - no one knew where.
4 seconds sound clip from the The Thin Man (1936) classic radio play.
You can hear this line at 00:49:05 in the radio play.
Quote context
[...]
- Morelli, would you mind holding your knife the pother way? You're worrying Gilbert.
- If that knife is missing, I'll look for it in your back.
- Well, after our hero killed Wynant, he got a brilliant idea.
- He realized that he and Julia could still collect money.
- Wynant was supposed to be on a trip - no one knew where.
- But it must have been Wynant. I should have known if it weren't his voice.
- Oh, he was clever about that. He called when you were out.
[...]