According to investigators, the first incident involved a 17-year-old at the headquarters of the District's Department of Employment Services.
The unidentified teen reports a man – employed at that department as a file clerk – made graphic remarks and inappropriate contact.
Police have arrested and charged Thomas Nelson, 54, with second-degree touching of a minor by a person in a position of authority.
The second incident at Anacostia High School in southeast D.C., involves a 19-year-old woman who claims she was the victim of inappropriate contact by a construction contractor at that school. Police have made no arrests, but the matter is currently under investigation.