I've been reading some of the coverage on this and I'm speechless. Not sure what to make of this one. 22 years old, spoiled rotten, driving a Beemer and pissing and moaning about how nobody likes him. Narcissistic at the very least, and obviously mentally unstable. As others have pointed out there is no provision in our mental health care system, such as it is, to preemptively remove someone from society for mental instability. The entry for mental health "treatment", such as it is, is contact with the local police department, and induction into the court-ordered and court supervised treatment.
Thank God there was a County Deputy Sheriff who spent good time at the range, and was in a position to end it. That Deputy has my Thanks and my sympathy for having no other choice but to take a life. He will no doubt be suspended with pay while the investigation is conducted and may likely even be called to testify before a Grand Jury before this is over.
I fear there are more like this one out there. There's no telling what this maniac has been up to, and I'm sure all the gun control people in California are all but masturbating over this one. I'm also sure we are going to be hearing far more about this guy than we ever wanted to in the near future.
I also find it interesting that the best reporting on this is all from the British press.