I have worked with the mentally ill for over 20 years now, and unfortunately, have seen this so many, many times- where one of my former patients goes out and either
A) Commits "suicide by cop"

Kills some folks and commits suicide.
I think you are all on the very, very wrong track with the ENTIRE pro-con gun ownership.
It is about making the mentally ill either
A) Take thier damn meds whether they like it or not

Make them legally culpable for thier crimes- even ones they commit while in a mental institution.
This discussion has been all around my worksite many, many times.
I would bet 10,000 dollars that this guy has seriously assaulted at least one mental health worker. IF you work in this field- you wouldn't take that bet.
If you really want t see this kind of thing become very rare (the mass shootings is rare, but killing one or two poeple, or attacking someone, is no so rare)- then we need to start charging mental patients with assault and battery against health care workers while they are institutionalized.
There is this very, very common misperception that "crazy poeple don't know what they are doing and cant help themselves"- it is pure bunk.
I have seen the gravely disableed make good choices, and the high functioning make bad choices.
Believe it or not, yes ,there are "evil" mentally ill patients- and this was one of them.
I have known the sweetest, nicest individuals that have been horribly mentally ill, with over 50 admissions- and then guys like Cho, who have this evil seed inside, and blame it on the illness when they are out of control.
What we need is NOT a dialogue over guns- we need a dialogue over public safety and our treatment of the mentally ill bad guys.
WE don't need to criminalize mental illness, we need to criminalize violent behavior exhibited by SOME mentally ill folks.
I have seen hundreds, if not into the thousands, of assaults by mentally ill patients against staff, some of them we euphemistacally call "sentinal events"- where there was extreme injury to staff, and the DA refuse to press charges, and then, that very same patient going out and murdering children and such.
HAD they simply been charged with felony assault against the health care worker- that person would have had 0 further victims- because they would have thier right to refuse medication taken away, had a probation officer holding thier every move.
So, if we REALLY want to stop things like this by the mentally ill, we REALLY need the following
A) Mandatory minimum felony charges against any assault against health care workers, with mandatory minimum sentences, to ensure they spend At LEAST five years in prison for asault, wtih a criminal record and probation to follow them around and ensure they are following thier conditions of probation to the letter.

The removal of the mentally ill that commit crimes from HIPPA requirements- all confidentiality stripped away, and have to join a "violent offender" registraton list, just like with sex offenders.
Now- this is AFTER they have already commited a crime against health care workers- so we ARE NOT suggesting that we just start rounding up the mentally ill and charge them with crimes- what I am suggesting is that we charge them with crimes when they commit them, instead of letting them go and letting them go until they do something REALLY bad.
Before I went to work at my hospital (I can talk about this specific case, I am not breaking confidentiality, because I never saw his chart, as he had commited his crimes before I went to work at the hospital) -
we had been FORCED by a judge to allow former murderers- declared "not guilty by reason of insanity"- to go on work release- over the objections over nearly everyone in the hospital, despite testimoney that we knew one of these guys would kill someone. The judge was not wrong- the law was. When you put the words "NOT GUILTY" in front of the verdict- they have all the rights of every citizen, no matter what the crime.
Well, we had about 10 time bombs walking the street then- and one of them killed four teenagers in a park while robbing thier car. while on "work release"- his former crime? He had beaten his cousin to death! Yet- here he was, walking the street- with NO direct supervision!
Well, we did change the law to "Guilty but mentally ill"- so now, if you commit the crime while mentally ill, you ge a LONGER sentance, NOT a shorter one, because you have the burden of proof to prove you are no longer mentally ill, before you are released.
We really need to close up the loopholes that allow bad guys and bad females the right to harm poeple, and the poeple that KNOW they are evil, we need to stop muzzling them when we KNOW they are a menace to the innocent, stripping them of any confidentiality of treatment when they commit violence against others.
edited to remove unintentional smilies at innapropriate places