Murder by the Lake

The Mermaid (1x9)

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Detectives Zeiler and Oberländer are called to a murder scene on the shore of Lake Constance. The victim was a mermaid. Sybille Baumgartner, wife of a famous local vintner, was found stabbed to death in shallow water wearing a costume rubber mermaid tail. She was a member of a local kitesurfing club. Meanwhile, Matteo, another member of the club, is shown leaving the scene of the crime stabbed with a knife still embedded in his abdomen. Oberländer and Zeiler need to figure out who wanted Sybille dead. Was it Matteo? Another member of the kitesurfing club? Or was her family to blame?