When the board denies clemency, the governor's only choices are to grant a 30-day stay or approve the execution.
Warner denied clemency in 11 other death penalty cases that came before him as governor.
It also noted that the board had denied clemency to other condemned men who had been model prisoners.
The Board denied clemency and, on September 21, it refused to reconsider its decision.
The confirmation of his sentence is read to him as well as the decision to deny clemency.
The president also denied clemency to another member, Birgit Hogefeld.
Just prior to the execution, Ehrlich released a statement in which he said he had decided to deny clemency.
Miller was denied clemency in 2001 but was released on parole in December 2007.
"The political pressure to deny clemency is overwhelming."
Gov. Bill Allain then denied clemency 90 minutes before the scheduled execution.