Karl Chmielewski was one of the most brutal concentration camp commandants in Nazi Germany. As commandant of Gusen, a subcamp of Mauthausen, he became notorious for extreme violence, torture, and the murder of prisoners. His cruelty earned him the nickname "The Devil of Gusen."

Discover the story of Karl Chmielewski's rise through the SS, his role in the Mauthausen-Gusen camp system, the infamous "death baths" that claimed thousands of lives, his later command of Vught concentration camp in the occupied Netherlands, and the justice he eventually faced after the Second World War.