Me neither. For one, the diagnostic principles may change again, as more is known about the brain, and also, five psychiatrists might disagree on the diagnosis of this guy, based on their personal experience. Also, meth can still be a factor in his mental state. That he is probably “not totally there” and has severe anger issues, we might agree, but he also works very well and is not disorganized under stress. He was able to kill fast and escape unnoticed. And this is very interesting. Supposedly, he had a bad day, and was hearing voices. What kind of job would you still be able to do? Probably the one that is routine for you...
If there is anyone with whom he shared the knowledge of the crime, as DC has said, I can bet it was not his shrink.