FORT HUNT, Va. — Seven months after it occurred, FBI investigators have returned to the scene of a fatal police shooting that began with a chase on a northern Virginia highway. Authorities closed several roads Thursday in Fairfax County while the FBI conducted police work in the location where 25-year-old Bjian Ghaisar (GAY’-sarr) of McLean was shot and killed by U.S. Park Police in November. Police initiated a chase of Ghaisar on the George Washington Memorial Parkway after he left the scene of a minor accident. Dashboard video shows police shooting Ghaisar after he started to pull away from officers who approached his stopped car with guns drawn. Ghaisar’s family has questioned the length of the investigation. The family said in a statement that they hope Thursday’s events indicate progress in the investigation.