Christopher Sepulvado, 81, died Saturday at the Louisiana State Penitentiary in Angola, Louisiana, "from natural causes as a result of complications arising from his pre-existing medical conditions," according to the Louisiana Department of Public Safety and Corrections.

He died at the Louisiana State Penitentiary in Angola, located in the eastern part of the state. Lawyers for Sepulvado in a statement announcing his death said he suffered from severe physical and mental decline in recent years.

An 81-year-old death row inmate who was convicted of the brutal murder of his young stepson died one month before he was scheduled to be executed by the state of Louisiana, according to local