Luigi Mangione entered a not guilty plea on Friday in New York federal court to the charge of murdering UnitedHealthcare CEO Brian Thompson.

Luigi Mangione, the suspect in the murder of UnitedHealthcare executive Brian Thompson, appeared in a New York court on Thursday to face new federal charges, including murder and stalking.

Authorities announced on Monday that the suspect accused of killing the CEO of UnitedHealthcare, a major insurance group, last week in New York City has been arrested by police in Pennsylvania, News.az reports citing foreign media.