Luigi Mangione, 26, was formally charged last week by the Manhattan district attorney with multiple counts of murder, ...

Prosecutors plan to try the 26-year-old on state charges first, before he faces federal charges in Brian Thompson's death.

Luigi Mangione, the man suspected of fatally gunning down UnitedHealth Group chief executive Brian Thompson on a Manhattan ...

As investigators continue to determine the motives and mindset that allegedly prompted Luigi Mangione to gun down ...