Even though laws are in place nothing can keep them in an institution for very long until after they've committed a major crime Usually they are turned out on the steets as homeless. ....
Although it’s very hard to impossible to commit somebody like Holmes for a long time, even one commitment gives an individual like him a psychiatric record that is supposed to be picked up by Insta Check and can usually prevent him from buying firearms. Looks like the shrink didn’t tag him, thereby enabling him to buy the guns.