Steven Den Beste gets the last, best word on the sniper:
There is no deep moral lesson here. There was nothing we as a society could have done to prevent this, nor is there anything we must do to prevent something like it happening again. All potential cures are worse than the disease. There are no perfect solutions, and this kind of thing is part of the price we pay for being in a free society. I would rather have this kind of thing happen than to live in a police state. It’s sad; it’s tragic; and it’s also unavoidable.
What else need be said?