TRUE CRIME ATLAS

Antwerp Diamond Heist

Published September 21, 2026Updated September 26, 2026

Theories

Compare the major theories, supporting claims, disputed points, and unresolved questions in this case.

Theory Comparison

A quick read on how the major theories differ before reviewing the full evidence and claims below.

SupportedHigh confidence
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Notarbartolo organised the burglary with the convicted Turin-area crew

The convictions, tenant-access records, discarded invoice and DNA, purchase trail, association documents and gemstone traces support the conclusion that Notarbartolo organised the operation with Finotto, D'Onorio and Tavano. The public evidence does not identify every person involved or establish the present location of the proceeds.

People
Leonardo Notarbartolo
Ferdinando Finotto
Elio D'Onorio
Pietro Tavano
Evidence
Notarbartolo's office, tenant badge and safe-deposit box gave him repeated legitimate access to the building and vault area before the burglary. His own box was not forced during the theft.
Investigators reconstructed the defeat of multiple protections, including magnetic contacts, light and heat detection, surveillance and physical locks. Some popular details derive from later reconstructions and Notarbartolo's account rather than a complete public forensic report.
More than one hundred safe-deposit boxes were forced with a purpose-built leverage tool. Contemporary reports commonly said 123 of 160; later technical reconstructions report 109, so the precise count is presented as disputed.
Torn papers from the Floordambos refuse were reconstructed into an invoice for a low-light surveillance system naming Leonardo Notarbartolo, providing a direct investigative lead.
Timeline links
Crew breaches the underground vault
Discarded refuse gives police their breakthrough
Appeal court sentences four participants
Sources
The Untold Story of the World's Biggest Diamond Heist
The Mastermind of the World's Biggest Diamond Heist Speaks Out in Netflix Documentary Stolen
Court Convicts Four in Antwerp Diamond Center Theft
Jail Sentences for Antwerp Diamond Robbers
Open questions
  • Who was the unidentified key specialist and were additional participants involved?
  • Where were the stolen assets moved after the burglary?
WeakenedLow confidence
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A diamond dealer commissioned a smaller theft as cover for insurance fraud

After conviction, Notarbartolo claimed a dealer he called Alessandro commissioned the operation, that the actual take was far below declared losses, and that merchants removed stock before the burglary to inflate insurance claims. Investigators and later reviewers reported finding no evidence that this commissioner existed, and the account conflicts with parts of the physical and documentary case.

People
Leonardo Notarbartolo
Evidence
More than one hundred safe-deposit boxes were forced with a purpose-built leverage tool. Contemporary reports commonly said 123 of 160; later technical reconstructions report 109, so the precise count is presented as disputed.
Notarbartolo's office, tenant badge and safe-deposit box gave him repeated legitimate access to the building and vault area before the burglary. His own box was not forced during the theft.
Timeline links
Crew breaches the underground vault
Sources
The Untold Story of the World's Biggest Diamond Heist
The Mastermind of the World's Biggest Diamond Heist Speaks Out in Netflix Documentary Stolen
Open questions
  • Can any independent record corroborate the alleged commissioner or advance payment?
  • How much property was actually present and removed from each forced box?