Case 129

The Dupont de Ligonnès Family

*** Content Warning: child victims, animal cruelty ***

In early April 2011, several friends and relatives of Nante’s Dupont De Ligonnès family received an unexpected letter that read: “Hi everyone! Huge surprise: we have to leave urgently for the U.S due to a very particular set of circumstances that we will explain below. When you read this letter, we will no longer be in France and won’t be able to return for an as-yet-undetermined period of time.”

Concerned friends weren’t convinced. They checked the family’s home and found the cars still in the driveway, the shutters closed and a note on the letterbox instructing all mail to be returned to sender. Inside, everything appeared to be in order, but all was not as it seemed.



Casefile Presents



Research – Erin Munro

Writing – Elsha McGill

Creative direction – Milly Raso

Narration – Anonymous Host



A special thank you to Holly Evans Plumelet and Sylvain Plumelet for their assistance with this episode.



‘Flatline intro’ and ‘Come play with me’ intro and outro –

Audio production – Mike Migas 

Scoring – Mike Migas and Andrew Joslyn



Logo and website design – Paulina Szymanska



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Dupont de Ligonnès Family Murder from 2011 – Marilyn Z. Tomlins

Killing of Nantes: Key dates of the case – Le Parisien

Drama of Nantes: “Five methodical executions” – Le Figaro

The scenario of the killing of Nantes is emerging slowly – Libération

The detail of the father’s escape to the Var – Le Parisien

Drama of Nantes: dinner father-son on 4/4 – Le Figaro

Testimonies shed light on the last days of the Dupont de Ligonnès family – Liberation

Killing of Nantes: the troubling testimony of a friend of Thomas – Le Parisien

Nantes: an ex-girlfriend of one of the sons testifies – RTL

The mystical obsessions of Xavier de Ligonnes put to the Net – Libération

The shaved head of Xavier Dupont de Ligonnès – L’Obs

Killing of Nantes: God and the 22 long rifle – L’Obs

The sister of Xavier Dupont de Ligonnès told him to “go to the police” – 20 minutes

An expert paints the portrait of Xavier Dupont de Ligonnès – Le Parisien

The “American friend” of Xavier Dupont de Ligonnès – France Soir

The body of Colette Deromme discovered: A link with Dupont de Ligonnès? – France Soir

Case Ligonnès: “And if Xavier had been murdered …” – Le Journal de Dimanche

Father wanted for family murder: “I’m superior” – The Local,

Dupont de Ligonnès case – Stéphane Goldenstein: “In this case, there is no certainty” – Le Point

Killing of Nantes. A surfer discovers that the mother confided her uneasiness on the web – Ouest France

The house of Nantes Dupont Ligonnès has been sold – L’Obs

‘I am still alive’: Alleged fugitive French killer contacts media – France 24

De Ligonnès: un Nantais avait déjà photographié le “mystérieux” cliché – Maville

Dupont de Ligonnès: the house of horror – Paris March

“It’s me they took for Xavier Dupont de Ligonnès”: the monk tells the police operation – LCI

The Monk Mistaken for a Monster: the Most-Wanted Murderer in France – The Daily Beast

Xavier Dupont de Ligonnès: his friend Michel convinced “he did not stay in France” – Europe 1

Xavier Dupont de Ligonnès, stalking on Facebook – Les Inrockuptibles

Study: family killers are usually men and fit one of four distinct profiles – Wired

Suspected fugitive accused of murdering family arrested in Glasgow – The Guardian

Man seized at Glasgow airport is not French fugitive, police confirm – The Guardian

Blame game erupts as Scottish police arrest innocent man over French murder – The Daily Record



Christine’s Blog

Dupont de Ligonnès murders and disappearance – Wikipedia



Non élucidée: L’affaire Xavier Dupont de Ligonnès

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