Upvote:6
The German wikipedia has more information on it:
Excerpt (auto translated, made sure the meaning has not been changed):
Since the local investigating authorities, later often criticized as incompetent, were overtaxed by the manifold witness statements, the lack of concrete traces and the increasing hysteria in Konitz, which was also forced by the fact that parts of Winters' body and clothes kept turning up in the village, deliberately placed there by the perpetrator or other persons, the Prussian Ministry of the Interior sent two experienced criminal investigators to Konitz on March 25, 1900. One of the two was Johann Braun, one of the most distinguished criminalists in Prussia at the time.
After several weeks of independent investigations in Konitz, Braun assumed that Winter must have been the victim of an act of violence resulting in death.
According to this, Hoffmann, a butcher, could have caught Winter in an intimate situation with his younger daughter and killed Winter with the intention of teaching him a lesson. Braun's cross-examination, in which he hoped to obtain a confession from Hoffmann and/or his daughter, failed, however, in part because an announcement of Hoffmann's arrest led to tumultuous protests by supporters of the ritual murder theory outside the building where the interrogation took place. Braun speculated that the protests, which were clearly audible in the building, encouraged Hoffmann to sit it out and remain silent.
So there seemed to be a specific incident and suspect that was investigated, but no evidence or confession could be obtained.