2. As soon as Otto left, John returned to Rome, mutilating his opponents and ousting his replacement, Pope Leo VIII
Instead of taking the more sensible course, John made preparations to return to Rome. Otto left the city shortly after the riot on January 4 964, leaving Pope Leo cowering in the Vatican Palace (presumably now free of prostitutes). John was back in Rome by mid-January, and incredibly, despite his terrible reign as Pope up to that date, the locals decided they liked him better than Otto and Leo. With tumultuous Romans hot on his tail, Leo fled to Otto’s court. John now took vengeance on those who denounced him the previous December, torturing and hacking them to death.
Otto’s reactions hitherto are uncertain, but he can’t have been happy. But what really made his blood boil was a Synod held on February 26 964. Here John excommunicated Pope Leo and, most foolishly, overruled the acts of the Synod that Otto had presided over when he was given the sack and deemed it illegal. Unable to tolerate this fresh attack on his authority by the troublesome priest, Otto marched with his army on Rome, this time no doubt dreaming of having John flayed alive. John took the hint, and went to hide out in Campagna that April.