Carey Dale Grayson made an expletive outburst and then took several minutes to die in Alabama as he was seen gasping for breath for the murder of a hitchhiker

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.

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.

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

An Alabama inmate found guilty of murdering a hitchhiker 30 years ago on Thursday became the third person in America to be executed using nitrogen gas, furthering the ongoing debate about whether the method is an inhumane way to carry out death penalty sentences.

Alabama has so far been the only state to execute inmates with nitrogen hypoxia, but two other states allow it as a method of execution.

Thirty years after the brutal death of a woman he was convicted of murdering, Carey Dale Grayson took less than 30 minutes to die. But the third inmate to be executed in Alabama with the use of nitrogen gas did not go quietly.