Fairfax County police have charged William Riddell, 40, of Chantilly with 14 criminal offenses relating to the possession and production of child sexual abuse material. He was arrested March 30 by the Salina Police Department in Kansas, where he was held prior to his extradition to Fairfax County.

Detectives from the Major Crimes Bureau’s Child Abuse Squad began investigating Riddell after it was reported that he may have had an inappropriate sexual relationship with a minor in Fairfax County. During the investigation, detectives allegedly uncovered electronic evidence of child sex-abuse material belonging to him. 

The alleged inappropriate relationship with a minor is still under investigation. Meanwhile, detectives charged Riddell with one count of possession of child pornography, first offense; nine counts of possession of child pornography, second offense; one count of reproduction of child pornography, first offense; and three counts of reproduction of child pornography, second offense. He has a July 23 court date.

He was previously a private music teacher in the Chantilly area. Riddell was also employed with Loudoun County Public Schools between 2008-2013 as a part-time substitute teacher. And in 2012, he was a paid booster clinician, a non-FCPS employee, at Chantilly High.

Detectives are concerned there may be more alleged victims and would like to speak with anyone who believes they or their children may have been involved in an inappropriate relationship with Riddell.

Anyone with information about this case, or others possibly related, is asked to call the Major Crimes Bureau at 703-246-7800, option 4. Tips may also be submitted anonymously via Crime Solvers by phoning 1-866-411-TIPS (866-411-8477).