History Daily: The Execution of France’s “Lonely Hearts Killer”

Host: Lindsay Graham
Date: February 25, 2026
Topic: The notorious crimes and execution of Henri Landru, France’s “Lonely Hearts Killer”

Episode Overview

This episode explores the chilling true story of Henri Landru, one of France's most prolific serial killers, known for targeting women through "lonely hearts" ads during World War I. The episode details how Landru lured widows with promises of marriage, murdered them for their savings, and ultimately met justice thanks to the relentless efforts of the victims’ families—culminating in his execution on February 25, 1922.

Key Discussion Points & Timeline

1. Scene Setting: A Night in 1916 (00:39)

• Narrative Introduction
  • Jean Montier, traveling through the countryside near Paris, encounters a scene he doesn’t yet understand—a foul stench, smoke from a chimney, and a mysterious man (Henri Landru) tossing something heavy into a pond.
• Significance: Years later, Montier will become a vital witness against Landru.

2. The Victims: Celestine Buizon’s Story (06:05)

• Celestine’s Vulnerability
  • A widow seeking companionship responds to a "lonely hearts" ad from “Georges Fremier," Landru’s alias.
  • “She’s found it hard to meet anyone with so many men away fighting the Germans.” (06:22 – Lindsay Graham)
• Sister’s Suspicion
  • Marie Lacoste, Celestine’s sister, is wary from the beginning: “There’s something about Georges that gives her the creeps. He’s too affectionate, too effusive, too oily.” (08:00)
• Red Flags
  • Georges takes over Celestine’s finances; after an argument, the sisters part ways.

3. The Disappearing Women and Dismissive Authorities (09:30)

• Marie realizes Celestine is missing, finds her apartment emptied.
• Authorities (the police and mayor’s office) express little interest in missing working-class women.
  • “In France at this time, working class women are considered little more than children in intellectual capacity.” (10:29)
• The first clue of a pattern: another woman has reported a similar disappearance.

4. Building the Case: Families Connect (14:24)

• Marie Lacoste meets Victorine Renaud Pellet, whose sister Anna vanished after a relationship with the same “Georges Fremier.”
• Both women were failed by police but decide to work together, enlisting Renaud’s father to bypass institutional sexism.
• Despite their efforts, the investigation initially stalls due to lack of physical evidence.

5. Breakthrough and Arrest (16:45)

• A friend of Marie’s spots Landru with a new woman; the police retrieve his address from a store receipt.
• April 12, 1919: Henri Landru is finally arrested.
  • Investigators find evidence of fraud, a coded notebook with the women’s names, and personal effects—but no bodies.

6. The Trial: Justice for the Victims (21:54)

• The Trial’s Drama
  • Landru faces 11 counts of murder and 37 counts of fraud.
  • His lawyer claims, “There was no proof that he had killed them,” and tries to undermine the investigation. (22:09)
• Courageous Testimony
  • Marie Lacoste’s composure on the stand is pivotal: “While Landru stared at her, she stared right back. Her testimony was so calm and compelling that Landru’s lawyer didn’t even bother to cross-examine her.” (23:16)
  • Multiple women testify to similar patterns.
• Jean Montier’s Testimony
  • Remembers the smoke and Landru by the pond, lending crucial corroboration.
• The Gruesome Evidence
  • Police find “nine pounds of charred bone fragments, along with scraps of women’s clothing and 47 teeth” on Landru’s property. (24:34)

7. Execution: February 25, 1922 (21:54)

• Vivid Description
  • Journalist Webb Miller covers the event: Landru, gaunt and shackled, is led to the guillotine at dawn in Versailles.
  • “Between Landru emerging from the prison gates and his head dropping into the wicker basket in front of the guillotine, only 26 seconds have passed.” (25:54)
• Reflection
  • Landru used war and social chaos to prey on vulnerable women, spotlighting both institutional neglect and individual courage.

Notable Quotes & Memorable Moments

• "He was a murderer. Henri Landru, one of France's most prolific serial killers. And when he is finally caught and put on trial, Jean's memories of that strange summer night will help ensure Landru pays the ultimate price for his crimes." – Lindsay Graham (00:39)
• “In France at this time, working class women are considered little more than children in intellectual capacity, the police officers have no interest in prying into another man's affairs just because Marie and Celestine have had a fight.” – Lindsay Graham (10:29)
• “She stared right back. Her testimony was so calm and compelling that Landru's lawyer didn't even bother trying to cross-examine her.” – Lindsay Graham, on Marie Lacoste’s testimony (23:16)
• “Nine pounds of charred bone fragments, along with scraps of women's clothing and 47 teeth.” – Lindsay Graham, on the evidence (24:34)
• “Between Landru emerging from the prison gates and his head dropping into the wicker basket... only 26 seconds have passed.” – Lindsay Graham (25:54)

Thematic Insights

• Vulnerability in Wartime: The chaos and loss of World War I left many women isolated and susceptible to predators.
• Systemic Sexism and Classism: The case highlights gross neglect of working-class women’s safety and credible complaints.
• Persistence and Solidarity: It took the sustained, creative efforts of grieving sisters to force authorities to pursue the case.
• Historic Impact: The Landru affair became a media sensation and a lasting cautionary tale in French criminal history.

Suggested Listening Order (with Timestamps)

• Chilling Witness / Opening Scene: 00:39
• First Victim’s Story (Celestine Buizon): 06:05
• Sisters’ Suspicion and Disappearance: 09:30
• Families Unite for Justice: 14:24
• Landru’s Arrest & Evidence: 16:45
• Trial & Emotional Testimony: 21:54
• Execution & Aftermath: 25:54

Conclusion

This episode offers a rich, suspenseful, and poignant retelling of the Landru case—showcasing how a serial predator was ultimately brought down not merely by chance, but by the dogged determination of the victims’ loved ones. It is a story of both horror and heroism, told with immersive detail and respect for those who fought for justice.