CHARLOTTESVILLE, Va. (AP) — Charlottesville’s police chief says an anguished statement from the parents of a missing University of Virginia student gives searchers a clearer understanding of the importance of their work. Police Chief Timothy Longo said Sunday that law enforcement is aggressively searching the county surrounding Charlottesville for any sign of Hannah Graham, who disappeared on Sept. 13. A day earlier, her parents made an emotional plea for whoever is responsible for the 18-year-old’s disappearance to help them find their daughter. Longo says he read the statement to searchers on Saturday and it gave them “a clearer understanding of the importance of finding Hannah Graham.” A search team of about 100 law enforcement officers and other trained searchers were combing through the countryside over the weekend to search for Hannah Graham.