Death Row inmate Wendell Grissom was denied clemency by the Oklahoma Pardon and Parole Board at a hearing on Wednesday, according to officials.

Grissom was sentenced to death in the deadly 2005 shooting of Amber Matthews.

During his trial, Grissom admitted to shooting Matthews twice.

Oklahoma Attorney General Gentner Drummond says Grissom is a "cold-blooded killer," and "...demands that justice be carried out."

Grissom is set to be executed on March 20.