Moo is that the shooter has absolutely zero, not even a sliver of a chance of wrangling his way out of the consequences before him.. His MI will not matter as far as "helping him" in a legal sense.. His only choice to attempt a way out is the insanity defense and I believe that is one thing that ALL OF US, HERE AGREE ON THAT WHILE HE MAY INDEED BE MI HE HOWEVER IS NO WAY IN HELL LEGALLY INSANE..
Matters not to me whether he is put to death by the state or whether he spends every brutally long day of the entire rest of his natural life encaged(<-sorry I think I just made up that word..lol) inside a maximum security prison and will die there..
For me it matters not(tho I must say that a large part of me believes that the entirety of natural life spent in prison a lot of times IMO seems to be the much more hellacious of the two..).. Either way he will NOT in any way, shape, or form be able to wiggle, wrangle, nor even give an Oscar worthy performance that will allow this monster to "get away with it"(ie.institutionalized vs incarcerated in prison/death penalty)
(p.s. to clarify I wasn't under the impression that he was possibly going "Scott-free".. That's never been my opinion.. I personally am relieved seeing it laid out in black and white exactly what this individuals entirety of his natural life will be spent doing(incarcerated or death)