Mangione was indicted on 11 counts, including first-degree murder and murder as a crime of terrorism.

The indictment accused Mangione of murdering Thompson with the intent to “influence the policy of a unit of government by intimidation or coercion.”

“This type of premeditated, targeted gun violence cannot and will not be tolerated,” Manhattan district attorney Alvin Bragg said in a statement announcing the indictment.

Mangione’s defence lawyer in New York, Karen Friedman Agnifilo, did not immediately respond to a request for comment.

Ivy League-educated Mangione was charged with murder on Dec 9 for the killing of Thompson outside a Manhattan hotel before a company conference, following a five-day manhunt.

Mangione suffered from chronic back pain that affected his daily life, according to friends and social media posts, though it is unclear whether his personal health played a role in the shooting.

Mangione is currently being held on gun charges in Pennsylvania, where he was arrested last week. Bragg’s office is seeking his extradition to New York.