Luigi Mangione’s legal team and federal prosecutors have held preliminary discussions about a potential plea deal in the case connected to the December 2024 killing of UnitedHealthcare CEO Brian Thompson, according to a source familiar with the talks who spoke on condition of anonymity. The discussions, described as routine for serious federal cases, did not result in an agreement. Mangione is due in federal court on Monday, where the parties are expected to focus on juror questionnaires and jury selection rather than plea negotiations.