Carey Dale Grayson is set to die by nitrogen hypoxia after being convicted of killing 37-year-old hitchhiker Vickie Deblieux in 1994.

The execution is the 22nd in the U.S. this year and the sixth in Alabama, which has put three of the men to death using nitrogen gas.

An Alabama prisoner convicted of the 1994 murder of a female hitchhiker became the third person executed by nitrogen gas in both the U.S. and Alabama.

Grayson was convicted with three other men for the brutal slaying and mutilation of 37-year-old Vicki Lynn Deblieux.

Grayson’s three accomplices managed to escape execution because they were under 18 at the time of Deblieux’s murder

An Alabama inmate convicted in a 1994 murder died Thursday in the state's third nitrogen hypoxia execution this year.

Prison officials in Alabama have executed convicted murderer Carey Dale Grayson, marking the state's sixth death sentence and third using the nitrogen gas method so far this year.

Grayson was one of four teenagers convicted of capital murder in the torture, bludgeoning and mutilation of Vickie Lynn Deblieux on Feb. 21, 1994.

An Alabama man convicted in the 1994 killing of a hitchhiker cursed at the prison warden and made obscene gestures with his hands shortly before he was put to death Thursday evening in the nation’s third execution using nitrogen gas.

An Alabama death row inmate was executed Thursday evening by nitrogen gas, but not before a Tex-Mex-style last meal and a profane rant directed at the execution staff. Carey Dale Grayson had been on death row for 28 years following the 1994 murder and mutilation of 37-year-old hitchhiker Vickie Lynn Deblieux,