A 15-year-old and her grandmother were killed in a car crash on Christmas while traveling with four other family members in Virginia, according to police and media reports. The family of Annie Vu and her grandmother, Su Nguyen, told NBC4 Washington that a driver accused of rear-ending the Vu family's van on the Beltway in Fairfax County on Christmas evening has yet to face justice. Duy Cao, the mother of Annie Vu and daughter of Nguyen, 75, was driving the family following Christmas dinner when the collision occurred, NBC4 Washington reported.