WASHINGTON — A high school security guard was arrested for having sexual contact with a 17-year-old girl while he was on duty.

Joseph Smith, 39, of Northeast D.C., was arrested and charged with first-degree sexual abuse of a minor on Oct. 19.

Smith was on duty as a security guard at Anacostia High School in Southeast D.C. when he had sex with the girl just after 5 p.m. on Oct. 18, D.C. police said.