WASHINGTON — A former teacher at Oak Hill Christian School in McNair is facing charges for alleged sex crimes involving a minor in Fairfax County.

Fairfax County police say David Mark Sabin, 38, of Ashburn contacted an undercover detective posing as a minor online.

Sabin no longer works at the school, but police want to speak with anyone who believes they, or their children, has inappropriate contact with the former teacher.

According to investigators, Sabin "initiated inappropriate conversations" with the detective -- who he believed was a 14-year-old -- and planned to travel to Fairfax County for a sexual encounter with the child.

During the course of the investigation, detectives say they linked Sabin to another case from October 2024, accusing the former teacher of trying to engage

See Full Page