ARLINGTON, Va. (DC News Now) -- Police said Friday that they arrested and charged an Arlington County Public Schools (ACPS) employee with a sexual-based offense. The Arlington County Police Department (ACPD) said officers began an investigation on Jan. 3 after receiving information about a substitute teacher assigned to Washington-Liberty High School who initiated a sexual relationship with a young female student back in September 2022. ACPD arrested Timothy McGhee, 47, of Alexandria on Jan. 10 as a result of that investigation. Arlington postpones new speed safety camera program due to weather and school closings Mugshot of 47-year-old Timothy McGhee. (Photo courtesy of the Arlington County Police Department) He was charged with Taking Indecent Liberties with a Child by a Person in a Supervisory or Custodial Relationship and Stalking. ACPD continues to investigate the incident and detectives believe there could be more victims. ACPD said McGhee has an extensive history of interacting with juveniles as he also volunteered at youth groups and churches and was a substitute teacher around Northern Virginia. Anyone with more information is asked to call 703-228-4244 or email [email protected].  Anyone who would like to remain anonymous is asked to submit a tip through the Arlington County Crime Solvers hotline at 1-866-411-TIPS (8477).