NEW YORK — Following the arrest of Luigi Mangione in a McDonald's in Pennsylvania, key evidence was uncovered that could tie him to the murder of UnitedHealthcare CEO Brian Thompson. During a court hearing, Officer Christy Wasser recounted how a backpack belonging to Mangione led to the discovery of a loaded gun magazine concealed in underwear.

This evidence surfaced as Mangione's defense seeks to exclude it from trial proceedings. Mangione is facing both state and federal murder charges, pleading not guilty to both during his appearances in court.

Wasser, with almost two decades of service in the Altoona police department, testified that once they detained Mangione, they followed protocols that mandated checking a suspect's belongings for safety reasons. Initial searches revealed items such as a sandwich before leading to the more concerning findings of gun-related materials.

Prosecutors argue that the handgun found in his bag was used in the shooting of Thompson, who was killed on December 4, 2024, as he approached a hotel for an investor conference. It was revealed that writings in a notebook further showcased Mangione's disdain for health insurers and possibly outlined motivations behind the murder.

As the legal battle unfolds, Mangione's attorneys argue that the search of his backpack lacked proper warrant authorization. Conversely, prosecutors maintain that the search was valid under exigent circumstances, which later led to a judge issuing a search warrant after the evidence had already been collected.

The revelation of the evidence has intensified the narrative surrounding Thompson’s murder case, with prosecutors framing the act as an execution-style killing, directly implicating Mangione in a broader disdain for health insurance practices as shown in the notebook notes. The outcome of this ongoing legal struggle remains pivotal for both the defense and prosecution as they prepare for trial.