I didn't throw the key away. I put it in my pocket. And someone could've taken it out of my pocket and substituted another.
5 seconds sound clip from the Clue (1985) movie soundboard.
You can hear this line at 01:15:00.213 in the Blu-ray version of the movie.
Quote context
[...]
- No.
- So who wasn't there the entire time in the kitchen?
- Whoever it was is the murderer.
- And we put the weapons in the cupboard locked it, and ran to the front door to throw away the key.
- We were all in a huddle. Anyone of us could've done that.
- Colonel Mustard has a top-secret Pentagon job.
- Mrs. White's husband was a nuclear physicist, and...
[...]