I'm sorry, because this has probably been covered before, but:
Were JR's roommates ever questioned or considered POIs? Or had they alread left Bloomington for the summer? We hear rumors about his mysterious "guest" but never any mention of roomies.
Since this is a college-age crowd we hear about roommates for every other known (and even some suspected) POI and the victim herself. But nothing on JR?
That's a pretty big townhome for one college dude.
TIA for any info.