Tatort S2005E29 - Ehrlicher - 39 - Freischwimmer

On a hot summer's day in Leipzig, a boy is found dead in an outdoor pool. It quickly turns out that Leo, who had Down syndrome, was drowned. Despite the hustle and bustle, the chief inspectors Ehrlicher and Kain cannot find any eyewitnesses to the murder. The lifeguard was also not at the pool at the time. When Leo's mother shows up, the inspectors learn that Leo was to testify as the main witness in a trial against 17-year-old Ralf Salchow. For the candidate city councilor Bettina Stein, who is pushing for a quick clarification for tactical reasons, the case seems obvious. Ehrlicher and Kain, however, do not believe in the obvious motive. Leo's sister Alexandra was also in the outdoor pool and should betake care of her diabetic brother.
However, she had retired behind the dressing rooms with her new boyfriend Mike, she claims. Mike belongs to Ralf Salchow's clique. They go to school together, where Leo's father Martin Stein works as a teacher and where he is bullied by the youngsters. Because of this, he tries everything to prevent his daughter's relationship with Mike. Election posters show the Steins as a happy family. But dark secrets seem to be hiding beneath the surface – motives for murder? Ehrlicher and Kain do not like this question at all. However, in this subtle case, they must follow up on every tip and suspicion, even if it is directed against the victim's family.