New York City’s police commissioner says the gun found on the suspect in the killing of UnitedHealthcare’s CEO matches shell casings found at the crime scene.

Luigi Nicholas Mangione was apparently living a charmed one: the grandson of a wealthy real estate developer, valedictorian of his elite Baltimore prep school and with degrees from one of the nation’s top private universities.

The suspect in the killing of UnitedHealthcare’s CEO struggled with deputies and shouted while arriving for a court appearance in Pennsylvania a day after he was arrested at a McDonald’s and charged with murder.