Continuity mistake: Colonel Mustard pours everyone a drink, he puts the whisky on the table and in the next shot the glass he poured whisky in is in his hand without enough time to pick it up. (00:41:15)
Casual PersonContinuity mistake: When the Cook's body falls out of the freezer on Mr. Green, he is pushed onto the floor. In the next shot, he is standing back up again. (00:33:20)
Casual PersonContinuity mistake: When the 1st chandelier fell, we see Peacock and White are standing near the front door. Scarlet then says "look!" Bringing everyone to look at the dead motorist in the study. Peacock and White are suddenly teleported to the study door behind Scarlet, even though they were quite far away with even a couple steps to climb down.
Continuity mistake: In the beginning when Col Mustard shows up, the butler shows him to the library, you can see that door to the library is open. When the scene shifts Wadsworth is opening the door. (00:05:30)
dabears51907
Answer: It depends on which ending you subscribe to. It could have been Scarlet to hide evidence of her brothel. It could have been Mustard to hide evidence of his affair with Yvette. Or it could have been White who wanted to destroy pictures of Yvette "in flagrante delicto" with other men (reminding her of her husband's infidelity).
Macalou