Anthony Todd Boyd, 54, was executed using nitrogen gas in Alabama on Thursday evening, despite a Supreme Court ruling that the method could cause 'unnecessary suffering' View 4 Images Anthony Boyd was executed by nitrogen gas (Image: File)

The state of Alabama has carried out its latest execution of a criminal using the controversial method of nitrogen gas, which causes four terrifying minutes of suffocation before death. ‌

On Thursday evening, Anthony Todd Boyd became the seventh death row prisoner to perish by nitrogen hypoxia in the state, with Alabama prison officials restraining him and fitting a mask over his face just hours after the US Supreme Court condemned the execution method for causing "intense psychological torment." ‌

The 54-year-old Boyd had been convi

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