Investigation records regarding crimes committed in the territory of the Warthegau, such as hearings of witnesses, exhumation, medical and autopsy reports, examination of corpses, correspondence, reports of former concentration camp prisoners, questionnaires regarding mass graves, lists of war criminals, files of the case of Artur Greiser (Reichsstatthalter der Warthegau), a collection of files from criminal proceedings and many others. Records relate to: Poznań, Żabikowo, Chełmno (Kulmhof) Śrem, Kórnik, Łódź, Kalisz, Włocławek, Gniezno, Ostrów, Kepno, Szamotuły.