sentenced to death in Arizona prior to November 15, 1992 still had the option to choose the gas chamber. Harding was the last prisoner executed in Arizona's gas chamber without having lethal injection as an option, although he was not the last person to die in Arizona's gas chamber overall; in 1999, Walter LaGrand, who was sentenced to death in 1982, requested the gas chamber as his method of execution. To date, he is the most recent person to be executed by hydrogen cyanide gas in a gas chamber in the United States. Coverage of Harding's execution and its aftermath stated that the warden threatened to quit if he were required to perform another gas chamber execution. The New York Times and Newsweek claimed Attorney General Woods became ill and vomited at the sight of Harding's convulsions. Woods later disputed those claims and stated that while he found that the execution left a lasting impression with him and was disturbing, he still supported the death penalty in Harding's case and did not become ill at Harding's execution. Victims 1979 December 10: Stanton Winston Blanton, 27 – Dallas, Texas 1980 January 3: Charles Dickerson, 35 – South Lake Tahoe, California January 10: Gerald Huth, 39 – near Paso Robles, California January 24: Allen F. Gage, 38 – Phoenix, Arizona January 25: Double killing – Tucson, Arizona Robert Wise, 35 Martin Concannon, 33 See also Capital punishment in Arizona List of people executed in Arizona List of serial killers in the United States References 1949 births 1992 deaths 20th-century executions by Arizona 20th-century executions of American people American spree killers Executed American serial killers Executed spree killers Male serial killers People convicted of murder by Arizona People executed by Arizona by gas chamber