Since historian Eduard Winkelmann's careful analysis in the 19th century, research has assumed that Otto VIII of Wittelsbach acted as a lone perpetrator. In contrast, historian Bernd Ulrich Hucker made a “comprehensive conspiratorial plan” in 1998 and suspected a “coup d'état”. The Andechs Dukes of Merania, King Philip II of France and Duke Henry I of Brabant should have been involved in this comprehensive plot; allegedly, the conspirators had planned to put the Duke of Brabant in the German throne. But Hucker's coup hypothesis did not prevail. It remains to be seen what use the French king would have had from the removal of Philip and his replacement by the Duke of Brabant. The House of Andechs, as loyal followers of Philip, who often stayed at his court and were protected by him, had no interest in his death.