The Spokane County Medical Examiner has released the identity of a man killed at Eastern State Hospital.

The medical examiner says 56-year-old Duane E. Charley died of strangulation early Tuesday morning.

The Spokane County Sheriff's Office has arrested 30-year-old Amber I. Roberts in the attack. She is jailed for investigation of first-degree murder.

Details of the incident have not been released.

Charley was found dead on the floor in the hospital's forensics unit, where patients are evaluated after being committed by a judge during a criminal case.