Skip to main content

Alabama modifies execution chamber for gas executions involving nitrogen hypoxia

Alabama is actively modifying its execution chamber to kill prisoners via nitrogen hypoxia, an untested method that would asphyxiate the condemned through a gas chamber or gas mask.

A federal judge last month ordered the Alabama Department of Corrections to provide information about the hypoxia protocol in an ongoing lawsuit filed by a man petitioning the court to have his spiritual advisor present at his execution.

"The ADOC is nearing completion of the initial physical build for the nitrogen hypoxia system and its safety measures. Once the build is completed, a safety expert will make a site visit to evaluate the system and look for any points of concern that need to be addressed," Alabama Attorney General Steve Marshall said in a Tuesday court filing. 

ADOC on Wednesday declined to answer a number of questions regarding the "physical build" referenced in court documents, including whether it intends to use a gas chamber or a gas mask to administer an execution method that has yet to be tested on human beings. 

"The ADOC’s nitrogen hypoxia execution protocol is still under development, and the physical building modifications to the execution chamber are still in process," the department said in a Wednesday statement. "Due to the fact those two items are not yet in a finalized state and potential security concerns exist, that is all we are able to share at this time."

Alabama passed nitrogen hypoxia legislation in 2018, one of only three states to legalize the method of execution. In theory, a condemned person would inhale pure nitrogen, which would asphyxiate them. 

The legislation, which proponents argued offered a more humane method of execution, effectively ended an ongoing lawsuit over lethal injection in Alabama. The legislation provided people incarcerated on death row a short window in 2018 to opt in to the method. 

But the new law codified a largely hypothetical method of execution. The method has never been tested on humans, and much of the scientific record on the subject comes from veterinary science or hazard investigations, where humans accidentally died in industrial accidents or similar situations. 

In Oklahoma, nitrogen hypoxia executions have technically been legal since 2015, but  last year the state said it would revert to lethal injections. In 2019, The Oklahoman reported multiple manufacturers declined to be involved in the execution process, with at least seven companies declining to sell the necessary "gas delivery device."

"The big issue with nitrogen hypoxia is it is experimental," said Robert Dunham, director of the Death Penalty Information Center. "We just have no idea whether it's going to work the way its proponents say it will. If it does, then there may be a viable alternative to lethal injection. If it doesn't, it may be just another method that was advertised as being humane that turns out not to be. It's completely unethical to experimentally kill someone, so we won't know. ... Nobody knows, nobody has indicated how its going to be carried out, though I suspect the death mask is more likely than a gas chamber. There was never any indication that Oklahoma intended to construct a gas chamber."


Multiple pharmaceutical companies have blocked purchases of lethal injection drugs in recent years amid growing opposition to the death penalty, leading some states to revert to alternate methods. 

New legislation in South Carolina resurrected the firing squad, though the state hasn't killed a prisoner in a decade, according the NPR. 

A Guardian investigation found Arizona recently purchased materials to kill condemned prisoners with cyanide gas, the same method used at the Auschwitz concentration camp during World War II. 

Arizona has "refurbished" an old gas chamber for the executions. Like Alabama, Arizona prisoners can choose between lethal injection or the gas chamber, though executions have been halted in the state for nearly a decade after a botched injection attempt. 

Source: montgomeryadvertiser.com, Melissa Brown, June 10, 2021


🚩 | Report an error, an omission, a typo; suggest a story or a new angle to an existing story; submit a piece, a comment; recommend a resource; contact the webmaster, contact us: deathpenaltynews@gmail.com.


Opposed to Capital Punishment? Help us keep this blog up and running! DONATE!



"One is absolutely sickened, not by the crimes that the wicked have committed,
but by the punishments that the good have inflicted." -- Oscar Wilde

Most viewed (Last 7 days)

China executes 11 members of gang who ran billion-dollar criminal empire in Myanmar

China has executed 11 members of the notorious Ming family criminal gang, who ran mafia-like scam centers in Myanmar and killed workers who tried to escape, Chinese state media reported on Thursday.  The Ming family was one of the so-called 4 families of northern Myanmar — crime syndicates accused of running hundreds of compounds dealing in internet fraud, prostitution and drug production, and whose members held prominent positions in the local government and militia aligned with Myanmar’s ruling junta. 

Florida | Man convicted of leaving girl to be eaten by gators avoids death penalty

After about 4 hours of deliberations, jurors on Friday recommended Harrel Braddy should be sentenced to life in prison for the 1998 killing of 5-year-old Quantisha Maycock.  A South Florida man who dropped off a 5-year-old child in the Everglades to be eaten alive by gators nearly 3 decades ago was given a second chance at life as jurors recommended he should spend the rest of his life behind bars instead of being sent to death row. After about four hours of deliberations, jurors on Friday recommended Harrel Braddy should be sentenced to life in prison for the 1998 killing of 5-year-old Quantisha Maycock. 

Federal Judge Rules Out Death Penalty for Luigi Mangione in UnitedHealth CEO Killing

NEW YORK — A federal judge has dismissed two charges against Luigi Mangione, the man accused of assassinating UnitedHealthcare CEO Brian Thompson, effectively removing the possibility of the death penalty in the high-profile case.  U.S. District Judge Margaret Garnett ruled Friday that the murder charge through use of a firearm — the only count that could have carried a capital sentence — was legally incompatible with the remaining interstate stalking charges against Mangione.

Georgia parole board suspends scheduled execution of Cobb County death row prisoner

The execution of a Georgia man scheduled for Wednesday has been suspended as the State Board of Pardons and Paroles considers a clemency application.  Stacey Humphreys, 52, would have been the state's first execution in 2025. As of December 16, 2025, Georgia has carried out zero executions in 2025. The state last executed an inmate in January 2020, followed by a pause due to COVID-19. Executions resumed in 2024, but none have occurred this year until now. Humphreys had been sentenced to death for the 2003 killings of 33-year-old Cyndi Williams and 21-year-old Lori Brown, who were fatally shot at the real estate office where they worked.

Oklahoma board recommends clemency for inmate set to be executed next week

A voting board in Oklahoma decided Wednesday to recommend clemency for Tremane Wood, a death row inmate who is scheduled to receive a lethal injection next week at the state penitentiary in McAlester.  Wood, 46, faces execution for his conviction in the 2001 murder of Ronnie Wipf, a migrant farmworker, at an Oklahoma City hotel on New Year's Eve, court records show. The recommendation was decided in a 3-2 vote by the Oklahoma Pardon and Parole Board, consisting of five members appointed by either the governor or the state's top judicial official, according to CBS News affiliate KWTV. Oklahoma Gov. Kevin Sitt will consider the recommendation as he weighs whether to grant or deny Wood's clemency request, which would mean sparing him from execution and reducing his sentence to life in prison without the possibility of parole.

California | Convicted killer Scott Peterson keeps swinging in court — but expert says he’s not going anywhere but his cell

More than two decades after Laci Peterson vanished from her Modesto, California, home, the murder case that captivated the nation continues to draw legal challenges, public debate and renewed attention. As the year comes to a close, Scott Peterson, convicted in 2004 of murdering his pregnant wife and their unborn son Conner, remains behind bars, serving life without the possibility of parole. His wife disappeared on Christmas Eve in 2002, and a few months later, the remains of Laci and Conner were found in the San Francisco Bay.

Death toll in Iran protests could exceed 30,000

In an exclusive report, the American magazine TIME cited two senior officials from the Iranian Ministry of Health, who stated that the scale of the crackdown against protesters on January 18 and 19 was so widespread that 18-wheeler trailers replaced ambulances. In its report, based on testimony from these two high-ranking officials, TIME revealed statistics that differ vastly from the official narrative of the Islamic Republic.

The US reporter who has witnessed 14 executions: ‘People need to know what it looks like’

South Carolina-based journalist Jeffrey Collins observed back-to-back executions in 2025 after the state revived the death penalty following a 13-year pause Jeffrey Collins has watched 14 men draw their final breaths. Over 25 years at the Associated Press, the South Carolina-based journalist has repeatedly served as an observer inside the state’s execution chamber, watching from feet away as prison officials kill men who were sentenced to capital punishment. South Carolina has recently kept him unusually busy, with seven back-to-back executions in 14 months.

Florida's second execution of 2026 scheduled for February

Florida’s second execution of 2026, a man convicted of killing a grocery story owner, will take place in February. Gov. Ron DeSantis signed the death warrant Jan. 23 for Melvin Trotter, 65, to die by lethal injection Feb. 24.  Florida's first execution will take place just a few weeks earlier when Ronald Palmer Heath is set to die Feb. 10. Trotter was convicted of first-degree murder and sentenced to death in 1987 for strangling and stabbing Virgie Langford a year earlier in Palmetto. 

China executes another four members of powerful Myanmar-based crime family

China has executed another four members of a powerful Myanmar-based crime family that oversaw 41 pig butchering scam* compounds across Southeast Asia.   The executed individuals were members of the Bai family, a particularly powerful gang that ruled the Laukkai district and helped transform it into a hub for casinos, trafficking, scam compounds, and prostitution.  China’s Supreme People’s Court approved the executions after 21 members were charged with homicide, kidnapping, extortion, operating a fraudulent casino, organizing illegal border crossings, and forced prostitution. The court said the Bai family made over $4 billion across its enterprise and killed six Chinese citizens.