CNBC | US Top News and Analysis Follow Luigi Mangione pleads guilty in federal case related to UnitedHealthcare CEO killing Mangione's lawyers argue his federal plea bars his prosecution for murder in state court for Brian Thompson's slaying due to New York's double jeopardy law https://www.cnbc.com/2026/08/14/luigi-mangione-pleads-guilty-brian-thompson-killing.html cnbc.com
