Well, then, he must have taken it.
3 seconds sound clip from the After the Thin Man (1936) movie soundboard.
You can hear this line at 00:06:06 in the DVD version of the movie.
Quote context
[...]
- Good-bye, Fingers. Come on, dear.
- Come on, we don't want to embarrass him.
- He's a purse snatcher. Think of his feelings.
- Well, then, he must have taken it.
- Dear, you do know the nicest people.
[...]