Prison officials in Alabama reportedly discovered a death row inmate dead on the floor of his cell on Sunday morning.

According to Fox News, 57-year-old Jeffrey Lynn Borden apparently committed suicide by hanging himself with a bed sheet.

Authorities indicate his body was found during a security check and has since been delivered to the Alabama Department of Forensic Sciences.

A stay on Borden’s execution was issued in October just hours before he was set to die for killing his estranged wife and father-in-law in 1993.

His was among the death sentence cases at the center of an argument over whether lethal injection in the state was an unconstitutional form of cruel and unusual punishment.

The same judge who issued the stay rescinded it the following month, though. He also shot down a subsequent defense request to reinstate the stay.

As of the most recent reports, it was not clear whether authorities had finalized a new execution date as of the time of his death.

He shot Cheryl Borden in her head in front of their children at a family gathering in Gardendale. As her father ran away, Jeffrey Borden shot him in the back.

Both victims died a short time after they arrived at an area hospital.

Sentenced to death after his conviction in 1995, Jeffrey Borden spent the remainder of his life on death row.

As WHNT reported, he was behind held at the William C. Holman Correctional Facility located in Atmore.

[Jeffrey Lynn Borden/Alabama Department of Corrections]