FBI agents have taken a 17-year-old Northern Virginia teen into custody for allegedly helping a man go to Syria to fight for ISIS. The FBI conducted a raid Friday on the townhouse where the high-school student lives with his family, neighbors said. So far the boy has been charged only as a juvenile, but federal prosecutors are trying to move the case into adult court. The teen reportedly aided an adult barely older than he by arranging his travel using online contacts with ISIS overseas. Another teenager from the same high school is being investigated as a lesser player. Prosecutors are also preparing to charge the man who traveled to Syria.