Leather jacket. Mustache. Tough guy. Heinz Sprenger is the "Schimanski" among German chief detectives. Not only because he shares the initials and the area of operation with him, but also because he has practiced his profession with the same passion as the legendary "Tatort" commissioner. However, one thing sets the two apart: Sprenger never followed a script; he led the homicide division in Duisburg in real life. During his over forty years of service, Heinz Sprenger was one of the most successful investigators in Germany. He was the one who solved the mafia murders in Duisburg, where six people were shot in front of an Italian restaurant in 2007. He was also the one who successfully brought a murder case without a body to court and achieved an important milestone in the Duisburg biker war.