An inmate serving 40 years at the Central Mississippi Correctional Facility has died, authorities said.

Roger Lynn Holliman Sr., 64, was pronounced dead Tuesday afternoon, Mississippi Department of Corrections officials said.

Holliman had been in prison since March 2019, after pleading guilty in February 2019 to two counts of sexual battery in Greene County. Holliman also pleaded guilty to statutory rape in September of that year in Wayne County.

The cause of Holliman’s death is unknown. Officials say an autopsy has been scheduled.