Luigi Mangione pleaded guilty on August 14, 2026, to federal stalking charges stemming from the killing of UnitedHealthcare CEO Brian Thompson, formally admitting in court to shooting Thompson outside a Manhattan hotel in December 2024. The federal guilty plea resolves one track of the legal proceedings against Mangione, though state charges in New York remain pending.

Thompson was shot and killed outside the New York Hilton Midtown on December 4, 2024, as he arrived for an investor conference. Mangione was arrested days later in Pennsylvania and has been held since. The case attracted extraordinary public attention, in part because of social media commentary that expressed sympathy for Mangione's alleged grievances against the health insurance industry.

The federal charges to which Mangione pleaded guilty centered on stalking, a charge that carries significant federal sentencing exposure. Prosecutors had built a case around evidence including a ghost gun, a suppressor, and a handwritten manifesto found on Mangione at the time of his arrest. His admission in court constitutes a formal acknowledgment of responsibility for Thompson's death under federal law.

The plea does not necessarily resolve Mangione's full legal jeopardy. Manhattan prosecutors have pursued parallel state charges, including murder, which could carry different sentencing consequences. Legal analysts have noted that the federal plea may factor into eventual negotiations or proceedings on the state side, though no resolution of those charges has been announced.

The case has remained a flashpoint in broader public debates about the American health insurance system, with Mangione having become a polarizing figure. Courts, however, have kept proceedings focused strictly on the criminal allegations. With the federal guilty plea entered, the next major legal question centers on how the state prosecution will proceed.