A 37 year old Sergeant with the Deschutes County Sheriff's Office has resigned during a criminal investigation into charges of sexual abuse and domestic violence against him. Deke DeMars has been on paid leave since February of last year when Redmond police started investigating the alleged assault charges filed by a woman in a romantic relationship with DeMars. The case had been turned over the Deschutes County D-A's Office with a police recommendation to charge DeMars with a sex crime. His resignation is retroactive to April first.