Almost every American is touched in some way by the criminal-justice system, either as a taxpayer or participant, and more and more young people are on the books amid a crackdown in schools. But our understanding of who gets arrested, why and what happens afterwards is spotty. Experts in the field bemoan this problem constantly. It’s partly because state and federal bodies don’t always work well together. Even when they do, the data are notoriously limited. [read the full story here]