Spandau Prison transferred to these concentration camps. After World War II the prison fell in the British Sector of what became West Berlin but it was operated by the Four-Power Authorities to house the Nazi war criminals sentenced to imprisonment at the Nuremberg Trials. Only seven prisoners were finally imprisoned there. Arriving from Nuremberg on 18 July 1947, they were: Of the seven, three were released after serving their full sentences, while three others (including Raeder and Funk, who were given life sentences) were released earlier due to ill health. Between 1966 and 1987, Rudolf Hess was the only inmate in the
Inert gas asphyxiation idea was then proposed by Lawrence J. Gist II, an attorney at law, under the title, International Humanitarian Hypoxia Project. In a televised documentary in 2007, the British political commentator and former MP Michael Portillo examined execution techniques in use around the world and found them unsatisfactory; his conclusion was that nitrogen asphyxiation would be the best method. In April 2015, Governor Mary Fallin of Oklahoma signed a bill allowing nitrogen asphyxiation as an alternative execution method. Three years later, in March 2018, Oklahoma announced that, due to the difficulty in procuring lethal injection drugs, nitrogen gas would be its