He is facing charges for allegedly murdering the CEO of a prominent U.S. health insurance company, with prosecutors claiming it was intended to intimidate the industry. Now, the specifics of his own insurance policy have become a controversial aspect in his legal proceedings.

Luigi Mangione, a 27-year-old graduate of the University of Pennsylvania, a prestigious Ivy League institution, had his insurance with Aetna. This company might have inadvertently provided excessive information to New York prosecutors when responding to a subpoena following the accused murder of 51-year-old UnitedHealthcare CEO Brian Thompson.

Mangione allegedly shot the father of two from behind outside a shareholder conference in New York City last fall.

Mangione has pleaded not guilty to various charges related to this killing, including murder and terrorism in New York, along with a federal charge of murder using a firearm. He is currently detained without the option of bail at a federal correctional facility in Brooklyn.

He is also facing prosecution in Pennsylvania, where police arrested him, allegedly in possession of a “ghost gun” and 3D-printed silencer.

He could face life imprisonment at the state level or the federal death penalty if convicted of the most serious charges.

His next appearance in the New York Supreme Criminal Court in Manhattan is scheduled for Sept. 16.