Luigi Mangione Admits Guilt Is He a Martyr.

Luigi Mangione has pleaded guilty in federal court and admitted that he shot and killed UnitedHealthcare CEO Brian Thompson, dramatically changing one of the most closely watched murder cases in America. His attorneys immediately moved to dismiss the New York State murder prosecution, arguing that trying him again for the same killing would violate New York’s double-jeopardy protections. Retired NYPD Sergeant Bill Cannon breaks down the guilty plea, why Mangione may have made this move, the sentence he now faces, and whether this strategy could actually prevent a state murder trial.