Uploaded June 2026 | Updated September 2026, 2 weeks ago

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This true crime documentary looks at how some true crime cases remain disturbing not only because of what happened, but because of the mysteries, investigations and unanswered questions they leave behind. In this episode of Dark Case Documentaries, we examine three infamous international true crime cases that continue to be discussed years later. First, we look at the murder of Keira Gross in Berlin and how false information spread across social media before police had even identified the real suspect. We then examine the case of former British banker Rurik Jutting and the murders of Sumarti Ningsih and Seneng Mujiasih in Hong Kong. Finally, we explore one of Denmark's most famous cold cases: the unsolved Carnival Murder of Stine Geisler, a case that has remained without answers for more than three decades despite one of the country's largest murder investigations.

This video is based on publicly available sources, court records and investigative reporting. It is presented for documentary, educational and historical purposes with the aim of accurately documenting each case and the investigations that followed.

If you enjoy long-form true crime documentaries, unsolved mysteries and carefully researched criminal cases, consider subscribing for more videos.

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DARK CASE DOCUMENTARIES brings you true crime documentaries, unsolved cases and investigates the deepest of mysteries. We take pride in creating respectful and informative true crime documentaries, as well as other content that arises from the darker side of the human race.

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Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.

Great effort is made to ensure all materials in Dark Case Documentaries videos fall within the guidelines of fair use. No copyright infringement intended. If you are or represent the copyright owner of any material accidentally used in this video and have an issue with its use, please contact me. This video is made for informational purpose.

Dark Case Documentaries tries hard to ensure that all of the information shared in our content is correct and true to real life events. As we relay information that is found through the research of multiple resources we cannot hold responsibility for the accuracy of information given, although every care is given. Dark Case Documentaries is an entertainment channel and not a reliable resource and should not be used as such. Please get in touch if you want to discuss changes or redactions. Content expresses my opinions and that of the guests, not expertise.

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