Who Did What Now - Episode 177
John George Haigh - The Acid Bath Murderer
Host: Katie Charlwood
Date: January 21, 2026
Episode Overview
This episode dives into the chilling true crime case of John George Haigh, infamously known as the "Acid Bath Murderer." Host Katie Charlwood offers a detailed account of Haigh's life, criminal evolution, gruesome murders, and ultimate downfall. Interwoven with insightful asides and dark humor, Katie recounts the historical backdrop, Haigh’s psychology, his methods, and the fate of his victims, providing both factual narrative and reflective commentary on crime, justice, and the macabre.
Key Discussion Points & Insights
1. Introduction to John George Haigh (Acid Bath Murderer)
[05:00]
- Katie introduces the subject, explaining high listener demand for the story.
- Briefly clarifies Haigh’s infamy and dispels the myth that he actually used a bathtubs:
“...the Acid Bath Murderer, even though he never used a bath to our knowledge.” (06:23)
- Context: Coverage of 1940s British crime, notorious for its high-profile murderers.
2. Haigh’s Early Life and Upbringing
[07:00]
- Born 1909, only child to Plymouth Brethren parents (a strict, puritanical Protestant sect).
- Extreme religious restrictions:
“No casual entertainment was allowed... Only stories from the Bible were allowed.” (09:45)
- Suffered religious nightmares in childhood.
- Showed early musical talent, won scholarships, but was a bully and manipulator at school.
3. First Forays Into Crime
[14:30]
- Left school, worked as an apprentice at Shell Mechs Limited—a wedge into car culture, which became a status obsession.
- Begins con artistry with forged signatures, fake car sales, and embezzlement.
- Married Beatrice "Betty" Hammer (1934); soon arrested for fraud. His prison sentence led Betty to put their baby up for adoption.
Notable Moment:
“Being very pregnant and having zero options, Betty decides fuck this for a game of soldiers. And after giving birth, makes the decision to put her daughter up for adoption...” (20:00)
4. Escalating Fraud and the First Prison Experiments
[23:00]
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Released early from prison due to WWII; parents cut ties after learning of the lost grandchild.
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Partnered in a dry cleaning business, which collapsed after his partner's death.
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Moved to London, took up a chauffeur job—became close with employer William Donald McSwan.
"It’s not surprising that people like this man because he’s a con man. And part of their whole shtick is to be charming. They charm to disarm." (27:00)
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Resumed fraud, pretending to be a solicitor, using misspellings to perpetrate scams, caught and imprisoned again.
5. The Acid Experiments
[31:05]
- In Lincoln Prison (early 1940s), began dissolving mice in sulfuric acid:
“...by experimenting... I mean, he’s dissolving field mice in sulfuric acid. Like he’s seeing how long it takes for the acid to dissolve the field mouse. But for why.” (31:08)
- Inspired by historical murderer Georges Alexandre Surratt (who was hanged for similar crimes).
- Realizes that if no human remains are left, prosecution is believed to be impossible.
Notable Quote:
“No victim left alive means there’s no one to rat on you. This was not intentionally a rodent pun, but here we are.” (32:30)
6. The Murders Begin
[43:00]
- Released early again (September 1943), Haigh moves to a basement flat and orders large amounts of sulfuric and muriatic acid.
- Reunites with McSwan, murders him in 1944 by bludgeoning and dissolving the body in acid.
- Strips valuables, dumps acid sludge down the basement drain.
- For a year, masquerades as McSwan, collects rent, and primes McSwan’s parents for the same fate.
Notable Detail:
“In a shocking and unprecedented turn of events... William McSwan’s body didn’t dissolve in 30 minutes like the mice did.” (46:01)
- Murders Donald and Amy McSwan next; disposes of them similarly.
- Forgeries and fraud allow Haigh to profit from their assets (exchanges, pension checks).
7. The Hendersons and Further Murders
[54:00]
- Haigh sets up in a Crawley storeroom (less ideal for body disposal) via a business connection.
- Targets Dr. Archibald Henderson and wife Rosalie (Rose), ingratiates himself, steals assets, murders both by shooting and dissolving them.
- Notably gifts Rose Henderson’s dress to his girlfriend, keeps the Hendersons’ dog.
8. The Fate of Mrs. Olive Durand-Deacon
[61:00]
- Haigh’s next and final victim is Olive Durand-Deacon, a wealthy widow residing at the Onslow Court Hotel.
- Lures her with a false business proposition regarding her invention (false nails), takes her to his workshop, shoots her, and tries to dissolve the body.
- Her routine disappearance is quickly noticed by hotel staff and other residents, leading to police investigation.
9. Investigation, Confession, and Capture
[71:43]
- Resident Constance Lane, suspicious, prompts a police inquiry.
- Police search Haigh’s belongings, find Olive’s possessions, and evidence tying him to earlier victims.
- At the crime scene, remnants (body fat, gallstones, dentures) are discovered. Dentures matched to Olive by her dentist.
- Haigh, believing “no body, no crime,” freely confesses, not understanding legal definition of corpus delicti.
- Attempts to feign insanity (“bloodlust,” “drinking victims’ blood”) to avoid conviction.
Notable Moment:
“...he starts acting a little bit crazy. He starts, like rewriting his own history... Like he’s the vampire of red riding up there.” (74:30)
10. Trial and Execution
[80:00]
- Court trial lasts just 17 minutes—found guilty, sentenced to death by hanging (executed by Albert Pierpont, 10 August 1949).
- Post-mortem: Buried in unmarked prison grave as was standard.
11. Legacy & Final Thoughts
[83:00]
- Haigh claimed three more (unconfirmed) victims.
- Katie underscores rarity of closure in 1940s crime stories:
“...sometimes the villain does get their comeuppance, and it’s nice to have something finished and sealed and closed...” (83:41)
Notable Quotes & Moments
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On Haigh’s upbringing and inherent cruelty:
“My, what a strict and unpleasant upbringing. I’m sure there will be no ramifications for this at any later point in this podcast episode about 1940s crime.” (10:01)
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On Haigh’s criminal confidence:
“Imagine if he went into legitimate business. Like, he would have done quite well, but this was more fun for him and involved surprisingly less cocaine than someone would think, especially for the era.” (26:30)
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On the effect of strict religiosity:
“...the Christian Bible is like the Torah with dlc.” (11:10)
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On crime and humor:
“I want everyone to appreciate how many jokes I didn’t make during this episode because I have such gallows humor and I listen to true crime and to relax.” (83:55)
Segment Timestamps
| Timestamp | Segment Description | |-------------|-----------------------------------------------------------------------| | 05:00 | Haigh and the Acid Bath Murderer legend introduction | | 07:00 | Family background, upbringing, and inner psychology | | 14:30 | Entry into adult life—crime, fraud, and early marriage | | 23:00 | Repeat frauds, new scams, and second imprisonment | | 31:05 | Acid experiments in prison—origin of murder method | | 43:00 | First murder (William Donald McSwan) and subsequent parental murders | | 54:00 | The Hendersons—Haigh’s evolving modus operandi | | 61:01 | Targeting and murder of Olive Durand-Deacon | | 71:43 | Discovery, investigation, and unraveling of Haigh’s crimes | | 80:00 | Trial, sentence, execution, and reflections | | 83:41 | Closing thoughts and on the satisfaction of justice being served |
Tone & Style
Katie Charlwood delivers the episode with a blend of dark wit, sidebars, and a conversational yet deeply researched tone. She maintains engagement through gallows humor, candid observation, and contemporary references, making historical crime accessible and engrossing for listeners.
Additional Recommendations
- Reading: The Talented Mr. Ripley
- Viewing: The Seven Dials Mystery (Agatha Christie)
- Listening: Blondie
Conclusion
The episode stands as a comprehensive, entertaining, and insightful retelling of John George Haigh’s criminal trajectory, characterized by his cunning, greed, and ultimate hubris that led to his execution. Katie’s narrative style brings levity and humanity to the horror, reminding listeners that, at least sometimes, justice prevails.