My wife and I were awakened at about 3:30-ish Saturday morning by some guy's screams for help. My wife could see out the window, but I could not, and she saw some guy pounding the tar out of some kid in the alleyway (really a utility-company access easement more than an alley); so, she called 911. The cops got there within 10 minutes, found the guy, and also found the house where the perps were still partying at.
Long story short, apparently the kid was also stabbed, and the perps in the party house pinned it on their neighbor, who turned out to be an ex-con who "didn't want to go back to prison". Since he wouldn't come out of his house, they called in SWAT to get him out of his house. The event lasted about 6½ hours from the time we called 911 until the guy was stuck in a police car and all the snipers came off the rooftops.
Pretty creepy to see snipers on the rooftops of you neighborhood, I tell you. Even more creepy to find out who or what your neighbors really are...