I've been thinking about that too, whoever did this has got to be having at least SOME issues dealing with it. Unless they are a total loner, family or friends would would sense something. If this is their first time murdering anyone I doubt they could compartmentalize anything this horrendous. Unless they were extremely drunk and/or high on drugs during the crime. Probably continuing to drink and drug afterward. I wonder if he's from Moscow, if so, i have a hard time believing he'd stay in the area after this. Of course since so many students have left town that makes things more complicated for LE.