Why did Henry IV remove Otto of Nordheim from the duchy of Bavaria?

In 1070, Henry IV removed Otto of Nordheim from the duchy of Bavaria after accusing him of complicity in a plot to murder the king.12

This action was part of a broader effort by Henry IV to consolidate his authority and address domestic unrest. During this period, Henry was working to increase royal possessions in the Harz Mountains and protect them with castles, a policy that had stirred significant discontent among the nobility and peasantry in Saxony. By depriving Otto—a widely respected noble—of his duchy, Henry sought to curb the influence of those opposing his centralizing measures.2