Idaho 4 thoughts..

I was thinking and maybe I’m fully wrong here but wasn’t BK in the class with someone’s cousin or friend? Any theories they are involved? My thoughts are these and maybe all over the place so apologies for that.
BK likes this friend/cousin goes a bit stalkerish follows them around to feel ‘close’ to them
Friend/cousin notices and decides to use that. They commit the crime then frame BK knowing he’s already there following them.
In no way saying BK is innocent but looking at some everything how did he do it so fast to so many people and with a knife? Gun fine boom boom boom boom done knife with that many wounds alone in what was 8 minutes? No chance. Quietly enough to kill all 4 but loud enough to be heard by roommates but also not to wake other victims?