A gunman posing as a delivery person shot and killed the 20-year-old son of a federal judge and wounded her husband at their New Jersey home before fleeing, according to judiciary officials. The shooting occurred Sunday evening at the North Brunswick home of U.S. District Judge Esther Salas, and killed her son, Daniel, Chief District Judge Freda Wolfson told The Associated Press. Salas was in the basement at the time and wasnt injured, according to a judiciary official who wasnt authorized to comment and spoke anonymously to the AP. Prior to that she served as a U.S. Magistrate Judge in New Jersey, after working as an assistant public defender for several years. Salas staggered their sentences so that one of them could be available to take care of their four children.