New York State Murder Trial May Be Dismissed After Defendant Pleads Guilty to Federal Stalking Charges

Luigi Mangione pleaded guilty in federal court to one count of interstate stalking resulting in death and one count of cyberstalking resulting in death for the December 4, 2024 shooting that killed UnitedHealthcare CEO Brian Thompson. The plea, entered during a federal hearing, included an admission that he shot Thompson.

Mangione’s attorneys have filed a motion to dismiss the pending Manhattan murder case, contending that the state prosecution would violate New York’s double-jeopardy prohibition because the federal and state charges arise from the same conduct. The defense argues that the federal stalking convictions constitute a judgment on the same criminal act that the state murder charge seeks to prove.

Legal analysts said the double-jeopardy principle, which bars successive prosecutions for the same offense, is likely to apply. "Dual prosecutions are prohibited if they’re part of the same criminal act or occurrence," said Neama Rahmani, a former federal prosecutor. Anna Cominsky, a law professor at New York Law School, noted that the defense’s argument hinges on the federal conviction precluding a state trial on the identical conduct.

State Judge Gregory Carro is expected to set a briefing schedule for the parties and may hold a hearing to resolve the issue before the previously scheduled jury selection in early September. Ron Kuby, a criminal defense attorney, predicted that the state case will not proceed, adding that New York’s double-jeopardy protections are broader than the federal statute.

Manhattan prosecutors have indicated they will contest the dismissal request, but the outcome will depend on the court’s interpretation of whether the federal and state charges constitute the same or substantially similar acts.