Luigi Mangione is set to pursue a psychiatric defence in his forthcoming state murder trial relating to the killing of UnitedHealthcare chief executive Brian Thompson, in what marks a significant development in one of the most high-profile criminal cases in the country.
A New York judge confirmed on Wednesday that Mangione's legal team intends to argue that he was suffering from an extreme emotional disturbance at the time of the December 2024 shooting in Manhattan.
Should a jury accept the defence, Mangione could face committal to a psychiatric treatment facility rather than a custodial sentence.
Judge Gregory Carro's ruling came a fortnight after a closed hearing on the matter, held at the request of Mangione's defence team. He stated he would unseal records relating to the hearing and the defence's motion for a psychiatric defence, according to the Associated Press.
"The reasons for the sealing was to give the defense an opportunity to determine whether they were going forth with that defense and the nature of that defense," Carro said, reports the Mirror US.
Carro had been due to rule on the matter on Tuesday, however the hearing was postponed until Wednesday after prosecutors neglected to inform Mangione's detention facility that he was required in court. Mangione is currently being held at the Metropolitan Detention Centre (MDC) in Brooklyn.
Mangione's solicitor, Karen Friedman Agnifilo, argued that unsealing the hearing transcript and associated psychiatric defence materials could prove damaging to his federal case. "The reason why we asked for the sealing is that this defense is not available federally, and Mr. Mangione is being prosecuted federally, and this is prejudicial to his defense to the exact same facts," Friedman Agnifilo said.
Mangione appeared at Manhattan Criminal Court for a pre-trial hearing on Wednesday.
Mangione, 28, stands accused of stalking and fatally shooting UnitedHealthcare CEO Brian Thompson, 50, at Midtown Manhattan's Hilton Hotel during a healthcare work conference on Dec. 4, 2024. He has pleaded not guilty to both state and federal charges.
Following a five-day nationwide manhunt, Mangione was spotted and detained at a McDonald's in Altoona, Pennsylvania. He was subsequently charged at both state and federal level before being transferred to Brooklyn's Metropolitan Detention Center, amid a heavily publicised perp walk and a significant show of force by law enforcement.
At Mangione's May 18 hearing, Judge Carro ruled that a firearm and notebook, which prosecutors allege connect Mangione to the killing, would be admissible as evidence against him.
The University of Pennsylvania graduate's state trial is scheduled to commence on Sept. 4.
His federal trial, concerning the stalking charges, is due to begin on Oct. 13. Should he be convicted in either case, he faces the prospect of spending the rest of his life behind bars.
