(NEW YORK) — Accused killer Luigi Mangione is due back in Manhattan federal court Monday after talks to resolve his case with a guilty plea stopped without a deal.

Mangione, who has pleaded not guilty to federal charges he stalked UnitedHealthcare CEO Brian Thompson before shooting and killing him in December 2024 in Midtown Manhattan, is scheduled to stand trial in federal court in early 2027.

Ahead of Monday’s hearing, defense attorneys and federal prosecutors discussed a possible plea deal, sources told ABC News, but the talks stopped without one. It’s not clear how close to a deal they came or whether they will try again. Criminal defendants can change their plea before or during trial.

On Monday, the parties are expected to discuss plans for a trial, including the questionnaire prospective jurors will complete before in-person voir dire questioning.

Mangione has also pleaded not guilty to state charges he murdered Thompson and is scheduled to stand trial in New York State Supreme Court in September.

Defense attorneys recently gave notice that they intended to mount a psychiatric defense to the state charges, arguing Mangione experienced an extreme emotional disturbance prior to shooting Thompson, but they quickly withdrew the notice before a deadline to turn over his psychiatric records.

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