One of the legal lessons of sad incidents like this is that in such cases, increasing draconian punishments doesn't work. I'm not thinking so much of restraining orders, though it applies to that too, as to stiffening the sentences and punishments for murder. What could be tougher than an immediate death sentence? Yet this is the penalty these killers inflict on themselves. Surely nothing that law enforcement could throw at them would deter.

Sure, it'd be easier if they'd just kill themselves first. And, in fact, a lot of people do just that.