A corrections officer was arrested at Northeast Correctional Complex in St. Johnsbury on Thursday and charged by the Vermont Attorney General’s Office with six felony counts of possession of child sex abuse materials. Benjamin G. Mallery, 30, of Sheffield pleaded not guilty to all six charges and was released on conditions by Caledonia Superior Court Judge Justin P. Jiron. Mallery faces a possible sentence of up to 27 years in prison and $55,000 in fines if convicted. According to an affidavit filed by Det. Matthew Raymond, commander of the Vermont Internet Crimes Against Children Task Force (ICAC), Mallery is accused of possessing seven images of child pornography on his personal Google Drive account. The investigation began after ICAC received a tip of possible child pornography from the National Center For Missing and Exploited Children via Google. Mallery is a Shift Supervisor at Department of Corrections facility on Route 5.