 's murder, and Michael decides to change his last name to Quartermaine, distancing himself from Carly and Morgan.Sonny breaks out of jail when Luke threatens Michael, and saves Michael and several others from being killed by a bomb Luke planted.When the governor grants Sonny a pardon for saving his daughter from the bomb, releasing him from prison, Michael is furious, and, as revenge, sues for custody of Sonny's newborn daughter Avery.