A 54-year-old prison inmate died early Tuesday at a Lincoln hospital.
Donald Krisor died at 4:17 a.m. at a Bryan hospital, according to a release from the Nebraska Department of Correctional Services.
Krisor was serving a 30-year sentence for manslaughter and use of a deadly weapon to commit a felony from Douglas County.
He had been an inmate at Tecumseh State Correctional Institution. His sentence began in 2016 and his tentative release date was in 2032.
The cause of death is not known, the release said, but Krisor was being treated for complications related to a medical procedure.
As is the case whenever an inmate dies in custody, a grand jury will conduct an investigation.