Luigi Mangione pleads not guilty to federal charges in the killing of UnitedHealthcare CEO

Luigi Mangione, the 26-year-old accused of murdering UnitedHealthcare CEO Brian Thompson, pleaded not guilty on Friday to all federal counts in the case.

Mangione's pleas were not surprising, given he has already pleaded not guilty to state charges in New York and Pennsylvania.

Luigi Mangione appeared in Manhattan federal court on Friday, with substantially shorter hair and mustard-colored prison clothing over a thermal white shirt. He was spotted conversing with his lawyers before Judge Margaret Garnett summoned him to stand and make his plea.

Mangione's court appearance comes roughly a week after a federal grand jury indicted him on four federal crimes in the December 4 assassination of the insurance executive.

Mangione's main federal accusation, murder with a firearm, carries a death sentence or life in prison, according to the US Attorney's Office for the Southern District of New York. The Justice Department submitted a notice on Thursday stating its intention to pursue the death sentence, weeks after Attorney General Pam Bondi authorized the office to do so.

Mangione is also facing state charges in New York and Pennsylvania, including first-degree murder in support of terrorism, two counts of second-degree murder, firearms charges, and one count of using a forged instrument.

Mangione's counsel filed petitions in Pennsylvania state court to dismiss charges and suppress evidence in case of trial. His attorneys said Mangione was improperly stopped and searched by officials, and they asked that his collected papers not be referred to as a manifesto.

The accusations come from Thompson's December 4 shooting in Midtown Manhattan, which prompted a five-day search.

Mangione was captured in Pennsylvania, more than 270 miles from the shooting location. He allegedly had the suspect's phony ID, the pistol believed to have been used in the killing, and a scrawled "claim of responsibility," according to officials.

Judge Garnett set the next hearing for December 5.