ROSEBURG, Ore. - A Roseburg man has been arrested and lodged in the Douglas County Jail on multiple sex abuse charges involving a minor.  On August 26, 2026, Oregon Department of Human Services Child Welfare Division received a report of past sex abuse of a minor. The Douglas County Sheriff's Office was notified and launched an investigation.  Through their investigation, detectives developed probable cause for the arrest of 30-year-old Derikk Ross Killcy of Roseburg. During an interview with detectives on Thursday, September 3, 2026, Killcy admitted to sexually abusing a minor child known to him. At the time the crimes were committed, the child was approximately 4-5 years old.  Killcy was arrested and lodged at the Douglas County Jail on the following charges:  First Degree Rape (12 counts); First Degree Sodomy (12 counts); First Degree Sex Abuse (12 counts); First Degree Unlawful Sexual Penetration.  Anyone with further information is encouraged to contact the Douglas County Sheriff's Office Investigations Division at 541-440-4458.