Luigi Mangione pleaded not guilty Friday to a federal murder charge in the killing of UnitedHealthcare CEO Brian Thompson.

Luigi Mangione pleaded not guilty Friday to federal murder and stalking charges as a mix of supporters, onlookers and others gathered at the federal courthouse in New York City.

Luigi Mangione pleaded not guilty Friday to a federal murder charge in the killing of UnitedHealthcare CEO Brian Thompson.

Luigi Mangione, the Maryland man accused of murdering United Healthcare CEO Brian Thompson, pleaded not guilty to federal charges today. NBC News’ Sam Brock reports about the stakes as federal ...

Luigi Mangione, the man accused of stalking and killing UnitedHealthcare CEO Brian Thompson, pleaded not guilty Friday to all charges in his federal court case, which could result in the death penalty ...

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