MONTGOMERY, Ala. (AP) — The Alabama Department of Corrections said Thursday that it is investigating the death of an inmate as a possible suicide.

The Jefferson County Coroner’s Office said prison staff reported finding 47-year-old Leon Demel Latham unresponsive Tuesday morning in his private cell at the William Donaldson Correctional Facility.

He was pronounced dead at the prison infirmary about 40 minutes later.

A spokeswoman for the Alabama Department of Corrections wrote in an email that the death was an “apparent suicide” but it remains under investigation.

The prison system said Latham was serving a life sentence for first-degree sexual abuse.