The Maine Department of Corrections said Wednesday that a Maine State Prison inmate died at 5:30 a.m. at Maine Medical Center.

Paul Henry Gray, 68, had been in prison 21 years, serving 55 years for murder. The Houlton man was convicted in 1993 of strangling a woman he lived with.

The department released no details about the death but said in accordance with department policy it will be reviewed by the Maine State Police and the Office of the State Medical Examiner.

Gray was scheduled to be released in 2028.