(Woodbridge)- A Montgomery County, Maryland police officer is among seven men under arrest in Prince William County after being caught in an online child sex sting. Undercover detectives posed as underage girls on social media websites and other websites last week and they say one of the seven men to respond was 27-year-old Christopher Dunkes of Gaithersburg. When Dunkes and the six other men were contacted, police say a meeting place was arranged and the suspects were arrested there. The other men range in age from 23 to 58 and live in Northern Virginia.