NASHVILLE, Tenn. (WKRN) — Governor Bill Lee will not intervene in the execution of Nicholas Sutton, the inmate scheduled to die by electrocution Thursday night at Riverbend Maximum Security Institution in Nashville.

In a statement released Wednesday morning, the governor said “after careful consideration of Nicholas Sutton’s request for clemency and a thorough review of the case, I am upholding the sentence of the State of Tennessee and will not be intervening.”

Sutton was sentenced to death in 1985 for fatally stabbing fellow inmate Carl Estep at the Morgan County Correctional Facility after a confrontation over a drug deal.

The condemned inmate was 23 years old at the time and already serving a life sentence for killing his grandmother when he was 18 years old. He had also been convicted of murdering Charles Almon and John Large in North Carolina when he was 18.

Sutton was moved to death watch Tuesday morning. Death watch is the three-day period before an execution when strict guidelines are implemented to maintain the security and control of the offender and to maintain safe and orderly operations of the prison, according to the Tennessee Department of Correction.

During this period, the offender is placed in a cell adjacent to the execution chamber where he or she is under 24-hour observation by a team of correctional officers.

Sutton has chosen the electric chair as his method of execution. His execution is set for Thursday night.