ONTARIO, Ore. (AP) -- An autopsy has found that an inmate at Snake River Correctional Institution who died Feb. 2 was killed.
The State Police said Thursday the suspect is the cellmate of 28-year-old Michael Clarence Hagen. The cellmate's name has not been made public.
The police said the case would go to the grand jury in Malheur County after their investigation is done.
Hagen was serving time for robbing a Portland check-cashing store and severely beating a clerk. He was found unconscious in his cell at the Ontario prison on Feb. 2 and died in an Idaho hospital.
The police said Dr. Larry Lewman, deputy state medical examiner, determined Thursday that the cause of death was head injuries, and the death was a homicide.