Pope John X
In order to increase his own power, Herbert II of Vermandois used his royal prisoner as a bargaining tool to secure the Archbishopric of Rheims for his son Hugh in 925 and the County of Laon for his son Odo in 927. The complaints from Rudolph led Herbert II to bring Charles before William Longsword, the count of Rouen, for homage and then to Rheims to press Charles' claim on Pope John X. In 928 Herbert II finally got possession of Laon, but the next year Charles died at Péronne and Herbert II lost his leverage against Rudolph.