Oh my gosh! I thought since Americans paid their taxes in part to pay the police that these types of crimes would be prevented. Who would have ever guessed that the police mainly respond to crimes after the fact.
I hope you purchase a firearm. I'll admit that it's unfortunate, but maybe next time if you infect the thugs with lead poisoning, the problem in your neighborhood may be mitigated. It would certainly be a hard thing for most people to live with but you would be doing the right thing.
Next time they try to rob you, shoot the bastards.