Fifty-six-year-old Earl B. Bradley of Lewes was arrested on Wednesday. He has been charged with second-degree rape, first-degree unlawful sexual contact and endangering the welfare of a child.
Troopers say the charges arose from an alleged incident between October and early this month.
Police searched Bradley's office, removing several computers and medical files.
Parents of children with questions or concerns are asked to contact Troop 4 detectives at (302) 856-5850 ext 216.