 He says the surge in carjackings has been fueled by young people. Despite challenges, including a D.C. law that can make it tougher to put repeat offenders behind bars, he says he's optimistic the numbers will keep dropping. We influence those trend lines. We don't control them. We're depending on a lot of things, and a lot of people are doing really good work, both inside and outside of the criminal justice system, from traditional prosecution to interruption to education and services. Shane Estulin, WTOP News.