Luigi Mangione is scheduled to appear in Manhattan state court Tuesday as his lawyers press a bid to have state murder charges in the killing of UnitedHealthcare CEO Brian Thompson dismissed on double jeopardy grounds, arguing that a parallel federal death-penalty prosecution makes it impossible to defend both cases simultaneously.
The hearing is expected to address whether the state case can go forward, whether terrorism counts should be dropped, and whether evidence seized at Mangione’s arrest last December — including a 9 mm handgun and a notebook prosecutors say contained expressions of intent to “wack” an insurance executive — should be barred from state use. The judge will also consider setting a trial date and deciding which case, state or federal, should proceed first.
Mangione, 27, an Ivy League graduate, has pleaded not guilty to multiple counts of murder, including murder alleged to have been committed as an act of terrorism, in the Dec. 4, 2024, slaying of Thompson. Surveillance video showed a masked gunman shoot Thompson from behind as he arrived for an investor conference at the New York Hilton Midtown. Authorities say the ammunition used was marked with the words “delay,” “deny” and “depose,” phrases commonly associated with tactics to avoid paying insurance claims.
Police captured Mangione five days after the killing, saying he was spotted eating breakfast at a McDonald’s in Altoona, Pennsylvania, and transported to Manhattan by plane and helicopter. He has been held in a Brooklyn federal jail since his arrest.
In filings, Mangione’s defense has characterized the overlapping state and federal prosecutions as a “legal quagmire” that makes it “legally and logistically impossible to defend against them simultaneously.” Defense lawyers have asked the state court to dismiss the state charges or, at minimum, to bar the use of certain evidence gathered during the arrest and to strike terrorism allegations they say are duplicative of federal prosecutions.
Manhattan prosecutors contend there is no double jeopardy problem because neither case has gone to trial and the two prosecutions pursue different legal theories. The state case alleges Mangione sought to “intimidate or coerce a civilian population,” meaning insurance employees and investors, while federal prosecutors have charged him with stalking-related offenses that do not include terrorism allegations.
Federal authorities moved in April to seek the death penalty, a decision directed by U.S. Attorney General Pam Bondi, who framed the killing as “an act of political violence” and a “premeditated, cold-blooded assassination that shocked America.” The federal case has prompted a separate arraignment and courtroom proceedings in recent months.
Prosecutors have cited writings found in Mangione’s possessions to support state charges, quoting passages they described as a manifesto that expressed contempt for the health-insurance industry and praise for the late domestic terrorist Ted Kaczynski. In court filings, they said Mangione’s diary included an apparent confession “To the feds,” where he wrote that “it had to be done,” and other passages indicating the slaying was intended to inspire change in the healthcare sector.
The state has asked the court to require Mangione’s defense to disclose whether it will pursue an insanity defense or introduce psychiatric evidence of any mental disease or defect. Defense counsel has resisted certain disclosures, signaling that such demands complicate defense planning while parallel federal capital proceedings loom.
The case has drawn an unusual public following. Dozens of supporters attended earlier hearings, some wearing green in reference to a Luigi video game character embraced by followers as a symbol of solidarity with Mangione. His federal arraignment in April saw similar displays of support.
Judge Gregory Carro could rule on the motions at Tuesday’s hearing, schedule additional argument, or issue written decisions at a later date. How the court resolves the sequencing of the state and federal cases, as well as any rulings on admissibility and the terrorism counts, could shape whether and how either prosecution proceeds to trial.
The Manhattan district attorney’s office has signaled it intends to pursue the state charges vigorously, while federal prosecutors have made clear they are prepared to seek the most severe penalty available. For now, both sides await the state court’s decisions on the immediate procedural and evidentiary disputes that defense attorneys say are central to Mangione’s ability to mount a coherent defense.