Sometimes when violence erupts, when knives flash and bullets shatter glass, it's the women and children who fall. Sometimes it happens four times in 33 months on the same little street. This is the case on Preston Avenue, a mile south of the skyscrapers of St. Petersburg. It is a street where worlds collide, where children play and gunshots ring, where laundry dries on the line and tires squeal in the dark. It's where Paris Whitehead-Hamilton, 8, was shot this week three times in the back.