UNIONTOWN, Pa. (AP) -- Authorities in western Pennsylvania say a state prison inmate found hanging from a bedsheet in his cell has died. The Allegheny County coroner's office will conduct an autopsy on 25-year-old Derek Andrew Thomas of Oliver. That's according to a report Sunday in the Pittsburgh Tribune-Review (http://bit.ly/1cf4994). A corrections officer at the Fayette County Prison in Uniontown found Thomas hanging on Dec. 22. The warden says Thomas had a pulse when he was cut down and taken to the hospital. The Allegheny County coroner's office says a doctor pronounced Thomas dead on Thursday at a Pittsburgh hospital. However, Fayette County officials said as recently as Saturday that the inmate was still alive. The prison is conducting an investigation.