I think what we know of his history clearly points to Schizoid Personality Disorder possibly progressing into Delayed Adolescent-Onset Schizophrenia. Borderline Personality Disorder, OTOH, would ordinarily involve a lengthy history of stormy interpersonal conflicts and contacts with social agencies and/or law enforcement with impulsive acts (this episode seemed to be anything but impulsive as it was planned for months). This guy was just a “different” sort: a loner. Obviously the act itself involves sociopathic behavior. Whatever his correct diagnosis I do believe his ability to understand right and wrong was intact, although possibly distorted. His telephone message seems just like one a guy I knew in high school and college would make; that guy committed suicide after becoming increasingly more bizarre and being diagnosed as schizophrenic. He would do things like come and bang on my dorm room door late at night for no reason and giggling like The Joker.
>>involve a lengthy history of stormy interpersonal conflicts and contacts with social agencies and/or law enforcement with impulsive acts <<
My sister is diagnosed with BPD. Short of a suicide attempt or rather a fake one that she told a friend about, she has never had contact with social agencies nor law enforcement.
My SIL as well. Never in trouble. The big thing about BPD patients is they refuse to believe their diagnosis. They just walk away from it. No follow up, no post care. If it’s an adult, even the parents can’t do anything to help. In most states, they can only be held for three days in a Ward.
They KNOW how to play people, they are quiet and dangerous. They cling when they need to and are easy to come up with a past that fits their plans.
I worked Psych. I saw lots of them as well. P/S are easy to work with as long as they stay on their med and don’t drink away their monthly Prolixin depot. BPD patients are the planners. As long as their end task is at hand, (like stalking someone) they will do whatever it takes to complete it.
One of his professors said he was “socially inept “——that’s still too many words, still too elaborate an explanation/justification. This geek doesn’t deserve endless analysis. I’m going with “nuts”!