It marked the first time a new execution method was used in the U.S. since 1982, when lethal injection was introduced and later became the most common method. The state had predicted the nitrogen gas would cause unconsciousness within seconds and death within minutes. After he had a chance to make a final statement, the warden, from another room, was to activate the nitrogen gas. And experts appointed by the U.N. Human Rights Council cautioned they believe the execution method could violate the prohibition on torture. Smith's attorneys had raised concerns that he could choke to death on his own vomit as the nitrogen gas flows.

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Persons: Abraham Bonowitz, Kenneth Smith, Kenneth Eugene Smith, Smith, gurney, Kay Ivey, Elizabeth Sennett, Ivey, Elizabeth Sennett's, Mike Sennett, Elizabeth Dorlene Sennett, Justice Sonia Sotomayor, Steve Marshall, John Q, Hamm, Jeff Hood, Hood, Sotomayor, Elena Kagan, Justice Ketanji Brown Jackson, he's, Sennett, John Forrest Parker, Charles Sennett Organizations: Holman Correctional, Alabama Gov, European Union, Human, EU, U.S, Supreme, State, Justice, Catholic, Prosecutors Locations: Columbus , Ohio, Holman, Atmore , Alabama, U.S, Alabama, United States, Geneva, gurney, Hamm, Vatican, Rome, Mississippi, Oklahoma