Although Rodrigo Díaz de Vivar (El Cid), the standard-bearer and confidant of King Sancho II, was present at the siege of Zamora, the role he played in this event is not known. Neither can Sancho II's death be blamed on Alfonso VI, who, when his brother was killed, was in exile far from the events. However, this did nothing to prevent speculation that Alfonso was somehow involved in Sancho's murder; despite a paucity of evidence, "minstrels and ballads filled this void with beautiful literary creations devoid of any historical reality".