Suspect in UnitedHealthcare CEO killing faces new federal murder charges with his return to New York

Federal prosecutors in Manhattan are charging Luigi Mangione, 26, with the federal crime of murder using a firearm, two charges of stalking and a charge of using an illegal gun silencer, according to a criminal complaint. The complaint accused Mangione of spending months planning an attack driven by his contempt for the health insurance industry and wealthy corporate executives.

Mangione was transferred into the custody of New York City police earlier on Thursday after he waived his right to extradition proceedings at a court hearing in Pennsylvania, the state where he was arrested following a five-day manhunt.

According to the federal complaint, a notebook Altoona police found in Mangione's possession contained several handwritten pages that "express hostility towards the health insurance industry and wealthy executives in particular." A notebook entry dated Oct. 22 described an intent to "wack" the chief executive of an insurance company at its investor conference.