Police believe the gunman who killed UnitedHealthcare’s CEO quickly left NYC on a bus after shooting

Mangione, a 26-year-old Ivy League graduate from a prominent Maryland real estate family, faces separate federal and state murder charges.

Luigi Mangione faces 20 total counts in federal court, Pennsylvania state court and New York state court. On Monday, he pleaded not guilty in the latter to 11 counts.

Nearly four days after the shooting of UnitedHealthcare CEO Brian Thompson, police still do not know the gunman’s name or whereabouts or have a motive for the killing.