Just my thoughts on what we've learned so far -
AH has most likely had some element of mental illness since puberty. It may have depression, bi-polar, generalized anxiety, social-anxiety, OCD, At the age of 18, if one is predisposed to become schizophrenic, that is the age when the majority of those who will become schizophrenic begin to experience its debilitating symptoms. And yes, the symptoms scream that something is terribly wrong. IMO, AH was also (screaming) for help. IMO. No normal 18-year old posts on the indelible internet the types of things he did - for the whole world to see. Just his videos alone would alienate and ostracize him from the traditional, college-going/career-minded 18 year old. For someone who cared so much about his physical appearance, sharing his bizarre thinking and behavior on public channels -- even going so far as admitting online - I have another side - a crazy side (I don't remember the exact words) but anyone who saw it and knew him would have told others about it - and he would no longer, not ever again, be accepted in whatever circles he did, at one time, participate. Again, screaming for help.
Schizophrenia itself does not drive one to murder. However, schizophrenia combined with other mental illnesses, drug abuse, prolonged stress, feeling incapable, inadequate, inferior, and unworthy perpetuate self-hate which translates into increased rage,. And unless that pent-up rage and anger is dealt with professionally, any trigger event (particularly if it comes from the person this person blames for his stress and emotional trauma) can throw the seriously mentally ill into full-blown psychosis.Whatever happened in that restaurant was the final trigger. And once one's brain and nervous system go into complete psychosis, there is complete absence of reality: hallucinations, hearing voices that command specific action, irrational paranoia that someone or someone is doing something (which they are not) and uncontrollable voices that repeat and repeat what one, by now could 100% believe he/she is anything from superman to God; have super-human powers like being able to fly, jump from buildings, and worse.
People in psychosis, as was A. Yates who drowned her five children don't try to hide their actions. People like D. Eisenhauer who murdered an 11-year old and tried to get away with by hiding her body. DE knew right from wrong. J. Arias tried to hide her actions. She also knew right from wrong. Obviously, AH didn't try to hide what he did, he did it right inside an open garage door.
As far as his hospital stay, I am certain he is restrained 100% of the time. He committed two murders.
We don't know much about his biological mother or step-mom. And we know some things about his Dad. But WT rules don't allow us to pass judgement on this forum. So, I will speak for myself. I have a 20 year old son in college. My side of the family has a history of mental illness. His personality did begin to exhibit signs of distress around 11th grade. Losing our home to Hurricane Sandy during that same year didn't help. I observed him like a hawk and still do, every single day, every word, body language, and general behavior. Took him to counseling, and then to a psychiatrist. Today, he takes meds for depression & anxiety (Lexapro) and is stabilized. However, during 'down times' (winter breaks, summer breaks) when he is not busy, the symptoms and behavior begin to surface again. I pray that nothing more severe will surface during his adolescent years.But right now, I am not 100% certain they will not.
As far as the items LE mentioned they had found, IMO, most of those items belonged to the victims and were inside their garage. Maybe, AH picked up the knife at his Mother's house after or before he drank the oil. j IMO when he drank the oil at his mother's house, he was already in psychosis. Who knows what he was thinking but I don't think it was calculated or rational (as in coating my stomach before I do x). Whatever his behavior at her home - she seemingly had no interest in dealing with it.
The blue liquid could have been anything from windshield wiper fluid to blue caracu (spelling?), a blue liquor used in certain cocktails. IMO the whiskey was in the garage. Perhaps they had a bar set up in their garage for visitors who stopped by since they supposedly spent alot of time sitting in their garage with the garage door open. I think he drank anything and everything he could get his hands on after the murders and before the act of cannibal..... It's not like he murdered and ran. He murdered, drank stuff in the garage, and then went back and continued the horrific acts - door wide open, neighbors next door, neighbor even discovered what was happening...and still he didn't run.
As for college, I think CARIIS is correct; in fact, I wouldn't be surprised if we learn he did not even attend school during the Spring 2016 semester.
As someone posted earlier up thread, should he live, he will either spend the rest of his life in a psychiatric institution for the criminally insane or in solitary confinement, as a high-risk prisoner.
ALL completely my own opinion.
hdear: it's about those cannibals in the woods. 
