Message to the person responsible for these events: *#$@ you. You are not God. You are evil. You are pathetic, everybody hates you. Maybe you can hide for a while, but we WILL find you, and we will kill you.
Message to everybody else: the Consitution of the United States of America clearly states "a well-regulated militia being necessary to the security of a free state, the right to keep and bear arms shall not be infringed." The term "well-regulated", at the time the Constitution was written, meant "well-equipped". Our free state is currently insecure due to a sociopath. The police are good at what they do, yet there is a limit to their abilities. Now, all of you able-bodied citizens go get yourselves well-equipped as appropriate, get your butts organized, patrol your blocks, find this creep, and stop him. Just make sure you get the right guy.
Message to anyone who disagrees with what I just said: you got a better idea? Make it happen.