How many movies have Holger Karsten Schmidt and Karl Kranzkowski collaborated on?

They have worked on 4 movies together! Their first movie together was Der Mörder ist unter uns (2003) while their highest rated movie together was Für immer ein Mörder - Der Fall Ritter (2014). They have not worked together since Für immer ein Mörder - Der Fall Ritter (2014). They are most known for their crime films together.