WaPo Duisburg - Season 1 Episode 4 Auf der Straße

A homeless person is found dead in the inner harbor. Carsten Heinrich von der Kripo quickly dismisses the case as suicide and leaves the "WaPo" to identify the victim. Marcel Bautz is already waiting impatiently at the guard: He misses his best friend - who turns out to be the dead homeless person. Bautz is sure that Hacki, whom he only knows by this name, was killed and the injuries of the dead also indicate this. But who would have a motive?