UKGuy,
That would be the top not the pants:
View attachment 256549
0254-01) THOMAS HANEY: Okay. Anything else on the bed? PATSY RAMSEY: Well, this looks like a little -- the little pot holder square she was making. This multi-colored thing here. This black thing I can't (INAUDIBLE). Oh, that's sort of looks like it might be the little velvet dress (INAUDIBLE). Little silver snaps. TRIP DeMUTH: When did she last wear that? PATSY RAMSEY: She wore that to the Whites on the 25th. - (0255-21) THOMAS HANEY: Well, it was documented also on video and I believe there is a description of what's in each room.
Clothing Found at the Scene
In the wine cellar: Nightgown
In JonBenet's bedroom: The shoes, pants, and vest she had worn to the Whites' party. The red turtleneck Patsy originally claimed JonBenet wore to bed. JonBenet's pajama shirt from the previous night (but no PJ pants). Feces-stained gray pants on the floor of JonBenet's bathroom.
- In the wine cellar: Nightgown

Shoes and pants worn to the Whites' party

Velvet vest worn to the Whites' party

Red turtleneck

Feces-stained pants
In consideration of your theories:
1. PR could have lost it due to a bedwetting incident but what made this night different from every other night? Because they were getting up early?
2. We know that BR and JB were caught playing doctor and told LHP to go away. PR knew about this. So who was JB going to tell?
What was the motive? I saw anger got the best of someone.
Perhaps BR lost in a fit of anger with JB. How do we explain these comment’s otherwise:
JR to BR: “We’re not speaking to you”. PR to BR: “What did you do”? BR reply’s: “What DID you find”?