Luigi Mangione, the accused killer of UnitedHealthcare CEO Brian Thompson, is expected to appear on state murder and terrorism charges in Manhattan on Monday — after being separately charged with federal death penalty-eligible offenses following his climactic return to City.

Federal and state prosecutors will follow a delicate legal choreography after characterizing Mr. Mangione’s actions differently in the fatal shooting of Brian Thompson.

Luigi Mangione faces four new federal charges, including murder, which could make him eligible for the death penalty. He is also facing multiple state charges.