Luigi Mangione, 26, appeared in a New York federal courtroom facing multiple charges, including murder through a firearm, related to the fatal shooting of UnitedHealthcare CEO Brian Thompson. During a brief hearing, a judge detailed the four federal charges against Mangione, who remains in custody pending bail applications. His attorneys raised concerns over the complexities of overlapping state and federal charges that make him eligible for the death penalty. Prosecutors have begun presenting evidence to a grand jury, revealing critical information such as fingerprint matches discovered at the crime scene.