On the Season finale of What Makes a Killer: On November 17th 2006, police in the German city of Cologne searched the vehicle of a 47-year man suspected of murder. What they found inside the truck was a collection of gruesome memorabilia. That day, police apprehended Volker Eckert, bringing an end to a 32 year career of murder that spanned five European countries. To this day, the exact number of his victims is still unknown. This episode is sponsored by:  Kenko (https://www.kencko.com/) Hello Fresh (https://www.hellofresh.com/?locale=en-US) Original music by Ben Krejci (https://soundcloud.com/ben-krejci) and Kai Engel (https://www.kai-engel.com/) . Licensed under Creative Commons: By Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) .