Picked up the gun where Yvette dropped it, opened the front door, recognized the singing telegram from her photograph, and shot her.
8 seconds sound clip from the Clue (1985) movie soundboard.
You can hear this line at 01:20:44.132 in the Blu-ray version of the movie.
Quote context
[...]
- You used her the way you always used her.
- You killed the motorist when we split up to search the house.
- How could I have known about the secret passage?
- Gentlemen, turn out your pockets. Ladies, empty your purses. Whoever has the gun is the murderer.
- Brilliantly worked out, Wadsworth. I congratulate you.
- Me, too.
[...]