A gas chamber is an apparatus for killing humans or other animals with gas, consisting of a sealed chamber into which a
poison
Poison is a chemical substance that has a detrimental effect to life. The term is used in a wide range of scientific fields and industries, where it is often specifically defined. It may also be applied colloquially or figuratively, with a broa ...
ous or
asphyxiant gas is introduced. Poisonous agents used include
hydrogen cyanide
Hydrogen cyanide, sometimes called prussic acid, is a chemical compound with the formula HCN and structure . It is a colorless, extremely poisonous, and flammable liquid that boils slightly above room temperature, at . HCN is produced on a ...
and
carbon monoxide
Carbon monoxide ( chemical formula CO) is a colorless, poisonous, odorless, tasteless, flammable gas that is slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the si ...
.
History
General Rochambeau
Marshal Jean-Baptiste Donatien de Vimeur, comte de Rochambeau, 1 July 1725 – 10 May 1807, was a French nobleman and general whose army played the decisive role in helping the United States defeat the British army at Yorktown in 1781 during the ...
developed a rudimentary method in 1803, during the
Haitian Revolution
The Haitian Revolution (french: révolution haïtienne ; ht, revolisyon ayisyen) was a successful insurrection by self-liberated slaves against French colonial rule in Saint-Domingue, now the sovereign state of Haiti. The revolt began on 22 ...
, filling ships' cargo holds with sulfur dioxide to suffocate prisoners of war. The scale of these operations was brought to larger public attention in the 2005 book ''
Napoleon's Crimes
''Napoleon's Crimes: A Blueprint for Hitler'' (french: Le Crime de Napoléon) is a book published in 2005 by French writer Claude Ribbe, who is of Caribbean origin. In the book, Ribbe advances the thesis that Napoleon Bonaparte during the Haiti ...
'', although the allegations of scale and sources were heavily questioned.
In America, the utilization of a gas chamber was first proposed by
Allan McLane Hamilton
Allan McLane Hamilton (October 6, 1848 – November 23, 1919) was an American psychiatrist, specializing in suicide and the impact of accidents and trauma upon mental health, and in criminal insanity, appearing at several trials.
He was a fou ...
to the state of Nevada.
Since then, gas chambers have been used as a method of execution of condemned prisoners in the United States and continue to be a legal execution method in three states, seeing
a possible, legislated reintroduction, although redundant in practice since the early 1990s.
Lithuania used gas chambers for civilian, penal use in the 1930s, with the last known execution carried out in 1940. The
Soviet Union
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
allegedly used the method to perform executions during the bloody
Great Purge
The Great Purge or the Great Terror (russian: Большой террор), also known as the Year of '37 (russian: 37-й год, translit=Tridtsat sedmoi god, label=none) and the Yezhovshchina ('period of Yezhov'), was Soviet General Secreta ...
, including by use of
gas van
A gas van or gas wagon (russian: душегубка, ''dushegubka'', literally "soul killer"; german: Gaswagen) was a truck reequipped as a mobile gas chamber. During the World War II Holocaust, Nazi Germany developed and used gas vans on a large ...
s. Prisoners were gassed on the way to the
Butovo firing range, where the
NKVD
The People's Commissariat for Internal Affairs (russian: Наро́дный комиссариа́т вну́тренних дел, Naródnyy komissariát vnútrennikh del, ), abbreviated NKVD ( ), was the interior ministry of the Soviet Union.
...
normally executed its prisoners by shooting them.
[Tomasz Kizny, Dominique Roynette. ''La grande terreur en URSS 1937–1938''. Lausanne: Éd. Noir sur Blanc, 2013, p. 236.] None of these saw mass use, however, and were strictly for "criminal" purposes.
Most notably, during
the Holocaust
The Holocaust, also known as the Shoah, was the genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe; ...
large-scale gas chambers designed for mass killing were used by
Nazi Germany
Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...
from the late 1930s, as part of the
Aktion T4
(German, ) was a campaign of mass murder by involuntary euthanasia in Nazi Germany. The term was first used in post- war trials against doctors who had been involved in the killings. The name T4 is an abbreviation of 4, a street address of ...
, and later for its
genocide
Genocide is the intentional destruction of a people—usually defined as an ethnic, national, racial, or religious group—in whole or in part. Raphael Lemkin coined the term in 1944, combining the Greek word (, "race, people") with the L ...
program.
More recently, escapees from
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korean Peninsula and shares borders with China and Russia to the north, at the Yalu (Amnok) and ...
have alleged executions to have been performed by gas chamber in prison camps, often combined with
medical experimentation.
Germany
Nazi Germany
Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...
made extensive use of various types of gas chambers for mass-murder during
the Holocaust
The Holocaust, also known as the Shoah, was the genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe; ...
.
Beginning in 1939, gas chambers were used as part of ''
Aktion T4
(German, ) was a campaign of mass murder by involuntary euthanasia in Nazi Germany. The term was first used in post- war trials against doctors who had been involved in the killings. The name T4 is an abbreviation of 4, a street address of ...
'', an "
involuntary euthanasia
Involuntary euthanasia occurs when euthanasia is performed on a person who would be able to provide informed consent, but does not, either because they do not want to die, or because they were not asked.
Involuntary euthanasia is contrasted with ...
" program under which the Nazis murdered people with physical and intellectual disabilities, whom the Nazis considered
"unworthy of life". Experiments in the gassing of patients were conducted in October 1939 in occupied
Posen in Poland. Hundreds of prisoners were murdered by
carbon monoxide
Carbon monoxide ( chemical formula CO) is a colorless, poisonous, odorless, tasteless, flammable gas that is slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the si ...
poisoning in an improvised gas chamber.
In 1940 gas chambers using bottled pure carbon monoxide were established at six killing centres in Germany.
In addition to persons with disabilities, these centres were also used during
Action 14f13 to murder prisoners transferred from concentration camps in Germany, Austria, and Poland. Concentration camp inmates continued to be murdered even after the euthanasia program was officially shut down in 1941.
During the
invasion of Russia, mass executions by
exhaust gas
Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through a ...
were performed by ''
Einsatzgruppen
(, ; also ' task forces') were (SS) paramilitary death squads of Nazi Germany that were responsible for mass murder, primarily by shooting, during World War II (1939–1945) in German-occupied Europe. The had an integral role in the imp ...
'' using
gas van
A gas van or gas wagon (russian: душегубка, ''dushegubka'', literally "soul killer"; german: Gaswagen) was a truck reequipped as a mobile gas chamber. During the World War II Holocaust, Nazi Germany developed and used gas vans on a large ...
s, trucks modified to divert engine exhaust into a sealed interior gas chamber.
Starting in 1941, gas chambers were used at
extermination camp
Nazi Germany used six extermination camps (german: Vernichtungslager), also called death camps (), or killing centers (), in Central Europe during World War II to systematically murder over 2.7 million peoplemostly Jewsin the Holocaust. The v ...
s in Poland for the mass-murder of
Jews
Jews ( he, יְהוּדִים, , ) or Jewish people are an ethnoreligious group and nation originating from the Israelites Israelite origins and kingdom: "The first act in the long drama of Jewish history is the age of the Israelites""T ...
,
Roma
Roma or ROMA may refer to:
Places Australia
* Roma, Queensland, a town
** Roma Airport
** Roma Courthouse
** Electoral district of Roma, defunct
** Town of Roma, defunct town, now part of the Maranoa Regional Council
* Roma Street, Brisbane, a ...
, and other victims of
the Holocaust
The Holocaust, also known as the Shoah, was the genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe; ...
. Gas vans were used at the
Chełmno extermination camp
Chełmno or Kulmhof was the first of Nazi Germany's extermination camps and was situated north of Łódź, near the village of Chełmno nad Nerem. Following the invasion of Poland in 1939, Germany annexed the area into the new territory of Re ...
. The
Operation Reinhard
or ''Einsatz Reinhard''
, location = Occupied Poland
, date = October 1941 – November 1943
, incident_type = Mass deportations to extermination camps
, perpetrators = Odilo Globočnik, Hermann Höfle, Richard Thomalla, Erw ...
extermination camps at
Bełżec
Belzec (English: or , Polish: ) was a Nazi German extermination camp built by the SS for the purpose of implementing the secretive Operation Reinhard, the plan to murder all History of Jews in Poland, Polish Jews, a major part of the "Fina ...
,
Sobibór, and
Treblinka
Treblinka () was an extermination camp, built and operated by Nazi Germany in Occupation of Poland (1939–1945), occupied Poland during World War II. It was in a forest north-east of Warsaw, south of the Treblinka, Masovian Voivodeship, vi ...
used exhaust fumes from stationary
diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...
s.
In search of more efficient killing methods, the Nazis experimented with using the
hydrogen cyanide
Hydrogen cyanide, sometimes called prussic acid, is a chemical compound with the formula HCN and structure . It is a colorless, extremely poisonous, and flammable liquid that boils slightly above room temperature, at . HCN is produced on a ...
-based
fumigant Zyklon B at the
Auschwitz concentration camp. This method was adopted for mass-murder at the Auschwitz and
Majdanek
Majdanek (or Lublin) was a Nazi concentration and extermination camp built and operated by the SS on the outskirts of the city of Lublin during the German occupation of Poland in World War II. It had seven gas chambers, two wooden gallows, a ...
camps. Up to 6,000 victims were gassed with Zyklon B each day at Auschwitz.
Most extermination camp gas chambers were dismantled or destroyed in the last months of
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
as
Soviet
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...
troops approached, except for those at
Dachau
,
, commandant = List of commandants
, known for =
, location = Upper Bavaria, Southern Germany
, built by = Germany
, operated by = ''Schutzstaffel'' (SS)
, original use = Political prison
, construction ...
,
Sachsenhausen and Majdanek. One destroyed gas chamber at Auschwitz was reconstructed after the war to stand as a memorial.
North Korea
Kwon Hyok, a former head of security at
Camp 22, described laboratories equipped with gas chambers for
suffocation gas experiments, in which three or four people, normally a family, are the experimental subjects. After the chambers are sealed and poison is injected through a tube, while scientists observe from above through glass. In a report reminiscent of an earlier account of a family of seven, Kwon claims to have watched one family of two parents, a son and a daughter die from suffocating gas, with the parents trying to save the children using
mouth-to-mouth resuscitation
Mouth-to-mouth resuscitation, a form of artificial ventilation, is the act of assisting or stimulating respiration in which a rescuer presses their mouth against that of the victim and blows air into the person's lungs. Artificial respiration ...
for as long as they had the strength. Kwon's testimony was supported by documents from Camp 22 describing the transfer of prisoners designated for the experiments. The documents were identified as genuine by Kim Sang Hun, a London-based expert on Korea and human rights activist.
Lithuania
In 1937–1940,
Lithuania operated a gas chamber in
Aleksotas within the First Fort of the
Kaunas Fortress.
[ Previous executions were carried out by hanging or by shooting. However, these methods were viewed as brutal and in January 1937, the criminal code was amended to provide execution by gas which at the time was viewed as more civilized and humane. Lithuania considered and rejected execution by poison. Unlike the American or German model the Lithuanian gas chamber, built out of bricks, worked by inputting compressed lethal gas from an external storage cylinder (Černevičiūtė 2014). The first execution was carried on July 27, 1937: Bronius Pogužinskas, age 37, convicted of murder of five people from a Jewish family.][ Historian Sigita Černevičiūtė counted at least nine executions in the gas chamber, though records are incomplete and fragmentary. Of the nine, eight were convicted of murder. One of these, Aleksandras Maurušaitis, was also convicted of anti-government actions during the ]1935 Suvalkija strike
The farmers' strike in Suvalkija was a civil unrest in interwar Lithuania in 1935. It mostly affected Suvalkija (southern Lithuania) where farmers demanded aid to help with a severe economic crisis.
The strike was caused by more than threefold d ...
. The last known execution took place on May 19, 1940 for robbery. The fate of the gas chamber after the occupation by the Soviet Union in June 1940 is unclear.
Soviet Union
According to Zhirnov, Soviet NKVD
The People's Commissariat for Internal Affairs (russian: Наро́дный комиссариа́т вну́тренних дел, Naródnyy komissariát vnútrennikh del, ), abbreviated NKVD ( ), was the interior ministry of the Soviet Union.
...
commander Isay Berg adapted vans with the storage compartment sealed and exhaust redirected inside it. These vans were used by the NKVD during the Great Purge
The Great Purge or the Great Terror (russian: Большой террор), also known as the Year of '37 (russian: 37-й год, translit=Tridtsat sedmoi god, label=none) and the Yezhovshchina ('period of Yezhov'), was Soviet General Secreta ...
(1936–1938) under disguise of bread vans to poison the victims during their transportation to the execution.
United States
Gas chambers have been used for capital punishment in the United States
In the United States, capital punishment is a legal penalty throughout the country at the federal level, in 27 states, and in American Samoa. It is also a legal penalty for some military offenses. Capital punishment has been abolished in 23 s ...
to execute death row inmates
, there were 2,414 death row inmates in the United States. The number of death row inmates changes frequently with new convictions, appellate decisions overturning conviction or sentence alone, commutations, or deaths (through execution or otherw ...
. The first person to be executed in the United States by lethal gas was Gee Jon, on February 8, 1924. An unsuccessful attempt to pump poison gas directly into his cell at Nevada State Prison
Nevada State Prison (NSP) was a penitentiary located in Carson City. The prison was in continuous operation since its establishment in 1862 and was managed by the Nevada Department of Corrections. It was one of the oldest prisons still operat ...
led to the development of the first makeshift gas chamber to carry out Jon's death sentence.
On December 3, 1948, Miran Thompson
Miran Edgar Thompson (December 16, 1917 – December 3, 1948) was an inmate of Alcatraz whose participation in an attempted escape on May 2, 1946, led to his execution in the gas chamber of San Quentin. At the time of the Battle of Alcatr ...
and Sam Shockley were executed in the gas chamber at San Quentin State Prison
San Quentin State Prison (SQ) is a California Department of Corrections and Rehabilitation state prison for men, located north of San Francisco in the unincorporated place of San Quentin in Marin County.
Opened in July 1852, San Quentin is th ...
for their role in the Battle of Alcatraz.
In 1957, Burton Abbott
Burton Wilbur Abbott (February 8, 1928 – March 15, 1957) was a University of California at Berkeley accounting student living in Alameda, California, who was convicted in November 1955 of the rape and murder of 14-year-old Stephanie Bryan.
...
was executed as the governor of California, Goodwin J. Knight
Goodwin Jess "Goodie" Knight (December 9, 1896 – May 22, 1970) was an American politician who served as the 31st governor of California from 1953 until 1959. A member of the Republican Party, he previously was the 35th lieutenant governor ...
, was on the telephone to stay the execution.
Since the restoration of the death penalty in the United States in 1976, 11 executions by gas chamber have been conducted. Four were conducted in Mississippi
Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Mis ...
, 2 in Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 ...
, 2 in California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
, 2 in North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia a ...
, and 1 in Nevada
Nevada ( ; ) is a state in the Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the 7th-most extensive, ...
. The first execution via gas chamber since the restoration of the death penalty was in Nevada in 1979, when Jesse Bishop
Jesse Walter Bishop (March 1, 1933 – October 22, 1979) was an American criminal convicted of the December 1977 murder of David Ballard during a robbery at a Las Vegas Strip casino. Bishop was executed in 1979 by the state of Nevada via gas chamb ...
was executed for murder. The most recent execution via gas chamber was in 1999. By the 1980s, reports of suffering during gas chamber executions had led to controversy over the use of this method.
At the September 2, 1983, execution of Jimmy Lee Gray
Jimmy Lee Gray (September 25, 1948 – September 2, 1983) was an American criminal convicted for the kidnapping, sexual assault and murder of three-year-old Deressa Jean Scales in 1976. At the time of this murder, he was free on parole after se ...
in Mississippi
Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Mis ...
, officials cleared the viewing room after 8 minutes while Gray was still alive and gasping for air. The decision to clear the room while he was still alive was criticized by his attorney
Attorney may refer to:
* Lawyer
** Attorney at law, in some jurisdictions
* Attorney, one who has power of attorney
* ''The Attorney'', a 2013 South Korean film
See also
* Attorney general, the principal legal officer of (or advisor to) a gove ...
. In 2007, David Bruck, an attorney specializing in death penalty cases, said, "Jimmy Lee Gray died banging his head against a steel pole in the gas chamber while reporters counted his moans."
During the April 6, 1992, execution of Donald Eugene Harding in Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 ...
, it took 11 minutes for death to occur. The prison warden stated that he would quit if required to conduct another gas chamber execution. Following Harding's execution, Arizona voted that all persons condemned to death after November 1992 would be executed by lethal injection
Lethal injection is the practice of injecting one or more drugs into a person (typically a barbiturate, paralytic, and potassium solution) for the express purpose of causing rapid death. The main application for this procedure is capital puni ...
.
Following the execution of Robert Alton Harris
Robert Alton Harris (January 15, 1953 – April 21, 1992) was an American car thief, burglar, kidnapper and murderer who was executed at San Quentin State Prison in 1992 for the 1978 murders of two teenage boys in San Diego. His execution was ...
in 1992, a federal court declared that "execution by lethal gas under the California protocol is unconstitutionally cruel and unusual." By the late 20th century, most states had switched to methods considered to be more humane, such as lethal injection. California's gas chamber at San Quentin State Prison was converted to an execution chamber for lethal injection.
As of 2020, the last person to be executed in the gas chamber was German national Walter LaGrand
The LaGrand case was a legal action heard before the International Court of Justice (ICJ) which concerned the Vienna Convention on Consular Relations. In the case, the ICJ ruled that its own temporary court orders were legally binding and that the ...
, sentenced to death before 1992, who was executed in Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 ...
on March 3, 1999. The U.S. Court of Appeals for the Ninth Circuit
The United States Court of Appeals for the Ninth Circuit (in case citations, 9th Cir.) is the U.S. federal court of appeals that has appellate jurisdiction over the U.S. district courts in the following federal judicial districts:
* District ...
had ruled that he could not be executed by gas chamber, but the decision was overturned by the United States Supreme Court
The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that involve a point ...
. The gas chamber was formerly used in Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
, Nevada
Nevada ( ; ) is a state in the Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the 7th-most extensive, ...
, New Mexico
)
, population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano)
, seat = Santa Fe, New Mexico, Santa Fe
, LargestCity = Albuquerque, New Mexico, Albuquerque
, LargestMetro = Albuquerque metropolitan area, Tiguex
, Offi ...
, North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia a ...
and Oregon
Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idah ...
. Six states (Arizona, California, Maryland
Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; ...
, Mississippi, Missouri
Missouri is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it is bordered by eight states (tied for the most with Tennessee ...
, and Wyoming
Wyoming () is a state in the Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the southwest, and Colorado to the sou ...
) authorize lethal gas if lethal injection cannot be administered, the condemned committed their crime before a certain date, or the condemned chooses to die in the gas chamber. In October 2010, Governor of New York David Paterson signed a bill rendering gas chambers illegal for use by humane societies and other animal shelters.
Method of use
Using hydrogen cyanide
As implemented in the United States, the gas chamber is considered to be the most dangerous, most complicated, most time-consuming and most expensive method of administering the death penalty. It is also notoriously impossible to halt once initiated, which has occurred in the case of stays, such as in the case of Burton Abbott
Burton Wilbur Abbott (February 8, 1928 – March 15, 1957) was a University of California at Berkeley accounting student living in Alameda, California, who was convicted in November 1955 of the rape and murder of 14-year-old Stephanie Bryan.
...
. The same event supposedly occurred in the final, completed execution of Caryl Chessman
Caryl Whittier Chessman (May 27, 1921 – May 2, 1960) was a convicted robber, kidnapper and serial rapist who was sentenced to death for a series of crimes committed in January 1948 in the Los Angeles area. Chessman was charged with 17 coun ...
in 1960. The condemned person is strapped into a chair within an airtight chamber, which is then sealed. The executioner activates a mechanism which drops potassium cyanide
Potassium cyanide is a compound with the formula KCN. This colorless crystalline salt, similar in appearance to sugar, is highly soluble in water. Most KCN is used in gold mining, organic synthesis, and electroplating. Smaller applications i ...
(or sodium cyanide
Sodium cyanide is a poisonous compound with the formula Na C N. It is a white, water-soluble solid. Cyanide has a high affinity for metals, which leads to the high toxicity of this salt. Its main application, in gold mining, also exploits its h ...
) pellets into a bath of sulfuric acid beneath the chair; the ensuing chemical reaction generates lethal hydrogen cyanide
Hydrogen cyanide, sometimes called prussic acid, is a chemical compound with the formula HCN and structure . It is a colorless, extremely poisonous, and flammable liquid that boils slightly above room temperature, at . HCN is produced on a ...
gas.
The gas is visible to the condemned, who is advised to take several deep breaths to speed unconsciousness. Nonetheless, the condemned person often convulses and drools and may also urinate, defecate, and vomit.
Following the execution the chamber is purged with air, and any remnant gas is neutralized with anhydrous ammonia
Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous wast ...
, after which the body can be removed (with great caution, as pockets of gas can be trapped in the victim's clothing).
Excluding all oxygen
Nitrogen gas or oxygen-depleted air has been considered for human execution, as it can induce nitrogen asphyxiation. The victim detects little abnormal sensation as the oxygen level falls. This leads to asphyxia
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. Asphyxia causes generalized hypoxia, which affects primarily the tissues and organs. There are many circumstances that ca ...
tion (death from lack of oxygen) without the painful and traumatic feeling of suffocation, or the side effects of poisoning.
In April 2015, Oklahoma Governor Mary Fallin approved a bill allowing nitrogen asphyxiation as an execution method. On March 14, 2018, Oklahoma Attorney General Mike Hunter and Corrections Director Joe M. Allbaugh announced a switch to nitrogen gas as the state's primary method of execution. After struggling for years to design a nitrogen execution protocol, the State of Oklahoma announced in February 2020 that it was abandoning the project after finding a reliable source of drugs to carry out the lethal injection executions.
In 2018 Alabama approved nitrogen asphyxiation as an execution method and allowed death row inmates a choice of method. An execution by lethal injection was stayed by a court In September 2022 because the inmate claimed to have made the election of nitrogen asphyxiation but the form had been lost.
Further reading
* Christianson, Scott (2010). ''The Last Gasp: The rise and fall of the American gas chamber'' (Kindle edition). Berkeley: University of California Press
The University of California Press, otherwise known as UC Press, is a publishing house associated with the University of California that engages in academic publishing. It was founded in 1893 to publish scholarly and scientific works by facult ...
,
References
External links
*
{{DEFAULTSORT:Gas Chamber
Infrastructure of the Holocaust
Execution methods
Execution equipment
Toxicology