Luigi Mangione, the 27-year-old suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson, is set to appear in a New York state court on Tuesday.
The hearing before Justice Gregory Carro in Manhattan could address Mangione's request to dismiss one of the two indictments related to the December 4, 2024, incident outside a Midtown hotel.
Thompson, 50, was killed during an investor conference hosted by UnitedHealth Group.
Mangione has entered not guilty pleas to both state and federal charges.
The 9 a.m. EDT proceeding occurs against a backdrop of rising concerns over political violence in the United States.
Recent events, including the killing of conservative activist Charlie Kirk, have prompted condemnations from officials across party lines.
Suspect Tyler Robinson in the Kirk case is slated for state charges in Utah on the same day.
While Thompson's death drew widespread bipartisan outrage, Mangione has garnered support from some quarters frustrated with high healthcare expenses.
In May, his defense team, headed by Karen Friedman Agnifilo, sought dismissal of the state case, claiming parallel prosecutions infringe on constitutional protections against double jeopardy.
Mangione faces nearly a dozen state charges, including first-degree murder as a terrorism offense, which could result in life imprisonment.
Manhattan District Attorney Alvin Bragg's office alleges the act aimed to intimidate health insurance workers and ignite reforms in the sector.
Federally, the Justice Department pursues the death penalty for interstate stalking and murder.
Defense attorneys argue the cases rely on incompatible theories, potentially forcing self-incrimination.
A June filing from prosecutors rejected claims of unfairness in the dual proceedings.
Additionally, Mangione's lawyers have moved to suppress evidence from his Pennsylvania arrest, citing missing Miranda warnings and an unlawful backpack search.
Items seized included a 3D-printed ghost gun and a handwritten document revealing his intentions, according to New York Police Commissioner Jessica Tisch.
The team also seeks more time to evaluate psychiatric evidence for the defense.
Justice Carro may establish a trial timeline, with the state case anticipated before the federal one, delayed until 2026 per U.S. District Judge Margaret Garnett.
The hearing underscores ongoing tensions in prosecuting high-profile cases involving public discontent.