the counselors noting that he wrote weird essays, should have sent him to a specialist a little earlier...evidently it was well known he was very strange, wrote weird gross stuff ... I think thats the only ones that might have had an insight...other than that...nobody could...only defense you`d have as a student would be to run faster than a bullet , or shoot back....
but knowing how frat parties go on, not sure weapons on campus would be so wise...

the teacher who got killed ,trying to block him was a 77 yr old holocost survivor