A story in the Philadelphia Tribune, which targets the city's African American community, illustrates the dangers of overselling the crimefighting powers of pre-k. House Republican leader Sam Smith and Democratic state Rep. Dwight Evans are sparring over just that. Smith has been saying Philadelphia has had Head Start and pre-k and still had more than 400 homicides last year. Evans and the city's police commissioner are saying spend more money on pre-k to cut crime. The story did a decent job of catching the back and forth. But the murders are happening now. An investment in pre-k will pay off but not next year or even for the next 10 years. Five year olds don't commit murders.