I watched the movie with my girl friend, who lives at Dachau and comes from a small village near Kneißl's birthplace. We had watched more of Rosenmüller's movies, and more likely than not we recognized some places in her neighbourhood.
But not this time. In the end we found out that the larger part of the movie had been filmed in the Czech republic. (Rosenmüller needed an old farm that was in a bad shape!) So it was a good movie with some fake local colour, but the actors were genuine Bavarians with a genuine dialect!
Kneißl himself certainly was no Bavarian version of Robin Hood, but a petty criminal who was framed by a local policeman when he was released after his first prison sentence. But even then he was guilty of murder or at least manslaughter, not to mention his robberies.