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 sentenced to death for the murder of a hitchhiker back in 1994 became the third person put to death by nitrogen hypoxia on Thursday evening amid controversy and outcry at the execution

On Thursday, the State of Alabama will carry out the nation's third nitrogen gas execution when 50-year-old Carey Dale Grayson is put to death for the murder of a woman in Jefferson County in the 90s.

ATMORE − The State of Alabama executed Carey Dale Grayson by nitrogen gas hypoxia Thursday evening for the brutal 1994 Jefferson County murder of a hitchhiker. It was Alabama's sixth execution for the year and the third in two months.

An Alabama prisoner convicted of the 1994 murder of a female hitchhiker is slated to become the third person executed by nitrogen gas

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.

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.

Carey Dale Grayson, a 50-year-old Alabama inmate convicted in the 1994 murder of a female hitchhiker, was put to death on Thursday using nitrogen gas.

Alabama has carried out nation's 3rd nitrogen gas execution, putting a man to death for the murder of a hitchhiker