Case Briefing

Osman Kaplan built his diamond empire over four decades, starting as an apprentice gem cutter in Istanbul's Grand Bazaar and rising to become one of the most powerful independent merchants in the European diamond trade. His success was built not only on his expert eye for quality stones but on a network of relationships — some legitimate, some operating in the grey areas of international commerce. Kaplan was known for his generosity with those who served him loyally, but he was equally known for his ruthlessness when he felt betrayed. In the months before his death, Kaplan had grown increasingly paranoid, confiding to his wife that he believed someone close to him was stealing from his inventory. He hired a private auditor who confirmed that approximately fifty thousand euros worth of uncut stones had gone missing over the previous year, but the auditor was unable to identify the thief before Kaplan departed on his final journey. The train trip itself was both business and personal — Kaplan was traveling to Vienna to meet with a major buyer and to consult with a specialist about his deteriorating heart condition, a fact known only to his wife and his bodyguard. The irony that his murder was designed to mimic cardiac arrest suggests the killer possessed intimate knowledge of Kaplan's medical vulnerabilities. Those who knew Kaplan well understood that the Orient Line route held deep sentimental value for him — it was on this very train, thirty years earlier, that he had proposed to his wife during a snowstorm in the Balkans.

The Suspects

4 people had the means, the motive, or the opportunity. Only one of them is the killer.

What You Will Investigate

Work through the full case file the way a real detective would: read the police report, walk the crime scene, question every suspect, and study the evidence — including Concealed Hypodermic Syringe, Puncture Wound Behind the Ear, Steward Master Key Log, Pharmacology Textbook, Corridor CCTV Footage Gap. Cross-reference statements against the physical evidence, spot the contradictions, and build your theory before you make your one and only accusation.

DifficultyHard
Suspects4
Evidence Files5
Playtime60–90 minutes
AccessPremium

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