sentences:  However, in the fall of 1568, asserting Eric's insanity, the dukes and the nobles rebelled, and after some resistance Eric was imprisoned by his brother Duke John, who took power on 30 September.Jöran Persson was assigned much of the blame for the actions directed against the nobility during Eric XIV's reign and was executed shortly after John III had incarcerated Eric, who was legally dethroned in January 1569 by the Riksdag.For the next seven years the ex-king was a source of anxiety to the new government.