A prisoner who was convicted of murdering two Georgia prison guards has taken his own life while awaiting his execution.

Officials with the Georgia Department of Corrections says officers found Ricky Dubose unresponsive in his cell at the Georgia Diagnostic and Classification Prison in Jackson, Georgia Sunday afternoon.

Despite attempts by Emergency Medical Services, Dubose was pronounced dead shortly before 6 p.m. Sunday.

The Georgia Department of Corrections and the Georgia Bureau of Investigation will conduct an investigation into Dubose’s death.

The inmate’s death comes less than two weeks after a judge sentenced him to death for his roles in the murder of corrections officers Curtis Billue and Christopher Monica while aboard a prison transport bus in 2017.