Tatort S2007E07 - Bienzle - 25 - Bienzle und sein schwerster Fall

In his new case, Bienzle must deal with a horrifying, if common, crime: the murder of a little girl. It looks as if the perpetrator did not strike for the first time. There are parallels to a case two years ago. The Commissioner Romberg who was responsible at the time was also quite sure that he knew the perpetrator, but he could not prove it to him. From his point of view, it is particularly tragic that a second murder has now taken place, as he believes that he could have prevented it. All the more urges Romberg Bienzle, who heads the special commission in this case, to follow up the trail again. Of course, Bienzle doesn't want to put on someone else's blinders and prefers to research openly in all directions.
Another girl murder happens and everything points to the perpetrator from back then. Bienzle seems to have failed and is personally at the end. But he doesn't give up and finds the real culprit - whom Romberg couldn't find himself.