 Also in 455, an ambiguous reference "infidoque tibi Burdundio ductu" implicates an unnamed treacherous Burgundian leader in the murder of the emperor Petronius Maximus in the chaos preceding the sack of Rome by the Vandals.The Patrician Ricimer is also blamed; this event marks the first indication of the link between the Burgundians and Ricimer, who was probably Gundioc's brother-in-law and Gundobad's uncle.In 456, the Burgundians, apparently confident in their growing power, negotiated a territorial expansion and power sharing arrangement with the local Roman senators.