Leland and Squi

I was just wondering if/when these two were interviewed, if they spoke of Christine just suddenly disappearing from the party that night. Squi (aka Chris) was dating Christine and Leland was the only other female there, so those two should have had pause to wonder why she left. It makes sense that while these two weren't eyewitnesses, they certainly would've had valuable information. And what did they say to her later? Did they notice unusual behaviour? Stuff like that. I can't wait till the report is leaked!