Despite a spate of recent attacks by juveniles on unsuspecting victims, Temple psychologist Laurence Steinberg points out that statistics show youth violence has actually been declining since it peaked in the mid-1990s. Steinberg says that despite recent events, it's hard to tell whether there's been a true rise in youth violence. "If we were living in a city where crime was very rare, then I think we would be much more curious about why two very similar crimes occurred within the same period of time," he says. "But in city like Philadelphia, where violent crime is common, it could just be a coincidence."