US Healthcare CEO accused killer charged with terrorism

Mangione's New York lawyer hasn't commented on the case.

Thompson, 50, was shot dead on a Manhattan street as he walked to a hotel where Minnesota-based UnitedHealthcare — the United States' biggest medical insurer — was holding an investor conference.

After days of intense police searches and publicity, Mangione was arrested on December 9 after being spotted in a McDonald's in Altoona, Pennsylvania.

New York police officials have said Mangione was carrying the gun used in Thompson's killing, a passport and various fake IDs, including the one that the suspected shooter presented to check into a New York hostel.