The people spoke with The Associated Press on condition of anonymity because they weren’t authorized to release information publicly.A courtroom had been set aside in a Manhattan federal courthouse for Mangione’s appearance and an overflow courtroom was designated as a location for people to watch the proceeding on video in the event there are more people than can fit in the courtroom.

It was writings laid bare in a notebook found in Luigi Mangione’s possession, authorities say, that would help investigators build the federal case against him – a well-planned homicide that involved weeks of stalking the movements of his alleged victim,

NBC News reported that Luigi Mangione, indicted in the killing of UnitedHealthcare CEO Brian Thompson, was transported to New York on Thursday (Dec. 19) after waiving his right to an extradition hearing.

Accused killer Luigi Mangione is facing charges that could bring the death penalty after being extradited from Pennsylvania back to New York City Thursday.

Luigi Mangione, the suspect indicted in the murder of UnitedHealthcare CEO Brian Thompson, waived his right to an extradition hearing and was flown from Pennsylvania to New York on Thursday afternoon to face federal charges.

The suspect in the killing of UnitedHealthcare’s CEO faces new federal charges of murder and stalking, escalating the case after his earlier indictment on state charges. Luigi Mangione agreed to return to New York to face a state murder charge Thursday at a morning court appearance in Pennsylvania where he was arrested after five days on the run.

Luigi Mangione agreed to return to New York to face a state murder charge Thursday at a morning court appearance in Pennsylvania where he was arrested after five days on the run. Mangione stood with his hands in front of him at his waist as his lawyers spoke with him.

Federal authorities unsealed the complaint Thursday in the high-profile case, which will proceed in parallel with the New York case in which he’s facing 11-counts at the state level.