What to know about Luigi Mangione's guilty plea in killing of UnitedHealthcare CEO Brian Thompson

Luigi Mangione pleaded guilty to federal stalking-to-kill charges after admitting he targeted and killed UnitedHealthcare CEO Brian Thompson in 2024 in Manhattan. Immediately following the plea, his lawyers filed paperwork claiming double jeopardy regarding a parallel state murder case scheduled for September 8th. The defense team's current strategy is focused on minimizing consequences by appealing to federal judge Margaret Garnett regarding potential life sentences.