When reports of the actions of the Dioscurus led council and the violent actions of his partisans reached Pope Leo he condemned the council and called it the ''Latrocinium'', a ''Robber Council'' and refused to recognize Anatolius as the lawful Bishop of Constantinople until he satisfactorily explained his belief. Theodosius, however, ignored the position of Leo. On [[July 28]], 450, the situation changed radically as Theodosius was killed in a horse accident and his sister Pulcheria returned to imperial power and married the general [[Marcian]], who became the new emperor. The empress and new emperor both opposed the teachings of Dioscurus and Eutyches. With the change in imperial leadership Anatolius and many other bishops now also condemned the teachings of Dioscurus and Eutyches. As a step to clarify the disputes Marician now called for a new council which was held in 451 in [[Chalcedon]].