Delinquency in youth predicts a significantly higher rate of violent death in adulthood — nearly twice the rate of combat troops in wartime Iraq and Afghanistan. Delinquent females — among the most vulnerable — died violently at nearly five times the rate of those in the general population, while delinquent males died at three times the rate. This is the first large-scale study to look at death rates in delinquent females and adds new data on Hispanics.