An inmate who shared a cell with Luigi Mangione has opened up about the alleged CEO killer's life behind bars.

ANALYSIS: A sell-out musical about the alleged UnitedHealthcare CEO assassin has hit the stage before Mangione has even gone ...

Luigi Mangione awaits trial at the Brooklyn Metropolitan Detention Center in Sunset Park, New York, for the December ...

He might be facing the death penalty — but accused killer Luigi Mangione is apparently thriving behind bars, according to a ...