On Monday, the man accused of murdering United Healthcare CEO Brian Thompson is set to appear in court, marking a year since the tragic incident. The hearings will focus on defense motions aiming to exclude specific evidence from the upcoming trial, notably the firearm allegedly used in the crime.

Luigi Mangione’s legal team is challenging the admissibility of a 9mm handgun and other items discovered in his backpack at the time of his arrest, five days following the shooting. They argue the evidence was obtained through an unlawful search, as reported by The Associated Press. Additionally, they seek to suppress statements made by Mangione, claiming that police interrogated him without first providing a Miranda warning.

This hearing pertains to the New York state charges against the 27-year-old Mangione. According to CrimeOnline, a judge previously dismissed a terrorism charge in September, leaving charges of murder and illegal possession of a weapon intact. Mangione has pleaded not guilty to these charges, as well as to firearms charges in Pennsylvania, where he was apprehended, and federal charges including murder, stalking, and firearms violations.

Federal authorities have stated their intention to seek the death penalty in this case.

Mangione is accused of ambushing Thompson on December 4, 2024, while Thompson was attending an investors meeting. The attack occurred on a sidewalk in Manhattan, triggering a week-long manhunt that concluded at a fast-food restaurant in Altoona, Pennsylvania.

The Manhattan District Attorney’s Office, as noted by the Associated Press, has extensively quoted from a notebook found in Mangione’s possession, which prosecutors say illustrates the motive for the killing. The writings allegedly refer to a “deadly, greed-fueled health insurance cartel,” and describe a company executive as “a greedy bastard that had it coming.”

Mangione’s notebook reportedly noted the United States “has the #1 most expensive healthcare system in the world, yet we rank roughly #42 in life expectancy,” while specifically mentioning UnitedHealthcare as one of the largest corporations in the United States. It is the largest insurance company in the country.

Prosecutors have not responded in writing to the defense’s written motions, which argue that an officer was heard on a body camera recording saying she was checking Mangione’s backpack for a bomb, which the defense said was “designed to cover up an illegal warrantless search of the backpack.”

Federal prosecutors have responded to similar motions in their car, arguing that the search was justified to ensure there were no dangerous items. Mangione’s statements before he was read his rights — which included giving a false name — were made voluntarily before he was arrested.

The state court hearings may last more than a week.

Mangione is being held without bond.