A staff member at the Tecumseh State Correctional Institution was hurt during an assault earlier this week.
The Nebraska Department of Corrections accuses an inmate of attacking the employee after the prisoner was stopped while leaving the dining hall, punching the employee repeatedly in the face.
No names have been been released.
The Johnson County Attorney will review the reports and determine what charges, if any, will be filed.
The staff member was treated at a hospital for injuries to his face and head.