He had initially pleaded not guilty in both the federal and state cases.

Luigi Mangione, the 28-year-old accused of murdering UnitedHealthcare CEO Brian Thompson, could plead guilty to federal charges, a source close to the matter has said.

Luigi Mangione is expected to plead guilty as early as Friday in the federal case accusing him of stalking and killing UnitedHealthcare CEO Brian Thompson, a stunning development…

Luigi Mangione plans to plead guilty in the federal case concerning Brian Thompson's death. This plea could avert a federal trial and potentially dismiss state murder charges.…