Staff Published: December 22, 2008 Prince William County police have charged a 17-year-old in the double slayings of a Dale City woman and her teenage son. Commonwealth’s Attorney Paul Ebert said Monday that Jean C. Smith, 39, and her son James Smith, 19, were killed during an attempted burglary at their home on Langford Court on Friday afternoon. The 17-year-old, who lives in the neighborhood, has been charged with two counts of first-degree murder, burglary and use of a firearm in the commission of a felony. Neighbors and sources identified the teen as Xavier Pinckney. His girlfriend, 22-year-old Jacqueline Munoz,...