Federal authorities filed a total of four counts against Luigi Mangione, who is accused of killing Brian Thompson, the chief executive of UnitedHealthcare.
Luigi Mangione, jailed in Pennsylvania, was charged in New York this week with first-degree murder in what prosecutors said was part of an “act of terrorism.”
Responses to an essay by Andrew Witty, the C.E.O. of UnitedHealth Group. Also: Threats to democracy, in Hungary and America; a check on Trump; avoiding taxes.