Luigi Mangione has pleaded not guilty in the December 4th shooting death of United Healthcare CEO Brian Thompson. Mangione voiced that not guilty plea to a judge Monday inside a New York City courtroom.

Luigi Mangione was charged in a four-count federal indictment that could land him the death penalty if convicted of murder.

Luigi Mangione, the suspected gunman in last week's killing of UnitedHealthcare CEO Brian Thompson, has been charged with murder. Reports described Mangione as the son of a prominent family in Baltimore who also surfed and worked in the tech industry.

Mangione, 26, is expected to be turned over to the NYPD by federal agents in the morning and brought into state court for his arraignment on murder charges.

Luigi Mangione was officially indicted on three counts of murder, as well as multiple weapons charges, in connection to the killing of Brian Thompson.

Luigi Mangione pleaded not guilty Monday to state charges in the murder of UnitedHealthcare CEO Brian Thompson.

A grinning Luigi Mangione appeared to yuk it up in a Manhattan courtroom Monday as he entered a plea in the murder of UnitedHealthcare CEO Brian Thompson.

Luigi Mangoine, who is accused of fatally shooting UnitedHealthcare CEO Brian Thompson, has pleaded not guilty. However, what online speculators noticed was the matching outfits of Mangione and his attorney as both of them appeared in court in clothes that seemed like a planned ‘twinning’.