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Even more of Au bout de l'enquête here: https://www.france.tv/france-2/au-bou... Subscribe https://bit.ly/3qzjwqL Intégrale l'Affaire Yvan Keller - Au bout de l'enquête Yvan Keller is a French serial killer, nicknamed the "pillow killer" or "granny killer". He was active from 1989 to 2006 in France, Switzerland and Germany. He confessed to killing around 150 people, which would make him the most prolific French serial killer of the 20th century. Every Saturday at 2 p.m. on France 2, this magazine focuses on "cold cases". Closed cases, deemed insoluble, which sometimes resisted the tenacity of investigators for nearly 50 years before a clue, an unexpected testimony or an innovative scientific expertise allowed the culprits to be caught. Alongside Marie Drucker, criminologist Alain Bauer provides technical, psychological, sociological or historical insight into each case to understand the procedures implemented during the investigation, as well as its issues and repercussions.