Hagen is a city in the state of North Rhine-Westphalia, in western Germany, on the southeastern edge of the Ruhr area, 15 km south of Dortmund, where the rivers Lenne and Volme meet the Ruhr. In 2023, the population was 197,677. From Wikipedia
New forensic analyses and expert reports overturn decades of murder speculation, resolving one of Germany's most famous cold cases.
