A timeline of Luigi Mangione’s criminal cases in the killing of UnitedHealthcare’s CEO

The story of Luigi Mangione's involvement in the death of UnitedHealthcare CEO Brian Thompson unfolds through a series of criminal proceedings. Initially, Mangione faced federal stalking charges in connection to Thompson's murder, which were resolved when he pleaded guilty to these charges on Friday. This plea paves the way for Mangione's trial on state murder charges, set for September 8.

Mangione's journey from arrest to trial began with his apprehension five days after Thompson's fatal shooting on December 4, 2024. He was intercepted at a McDonald's in Altoona, Pennsylvania, where he provided a false ID—claiming the name Mark Rosario—before police recognized his real identity as Luigi Mangione.

During his time in custody, police discovered several items associated with the crime. A backpack found in Central Park contained Monopoly money and a black Tommy Hilfiger jacket, items police claim were left by the shooter. Moreover, a 3D-printed pistol and a notebook expressing Mangione's desire to "wack" a health insurance executive were found in the backpack.

As the proceedings unfolded, key dates marked the trajectory of Mangione's legal battles. His guilty plea on federal stalking charges was followed by his extradition from Pennsylvania to New York, where he was led through a ceremonial perp walk in front of media cameras. The judge in the state case, Gregory Carro, made several significant rulings.

One such decision was the rejection of Mangione's terrorism charges, a move that spared him from a mandatory life sentence without parole. Another crucial ruling was U.S. District Judge Margaret Garnett's decision to bar federal prosecutors from seeking the death penalty against Mangione, a move that eliminated that aspect of the federal case.