NEW YORK (AP) — Luigi Mangione returned to court recently for a hearing aimed at excluding evidence that allegedly connects him to the murder of UnitedHealthcare CEO Brian Thompson. This hearing is a part of a larger legal battle, where Mangione is contesting both state and federal charges.

During the session, the prosecution displayed video evidence from the scene of the crime and relevant security footage of Mangione's arrest at a Pennsylvania McDonald's. Mangione, 27, managed to keep a composed demeanor, though tensions ran high as audio of a 911 call surfaced, revealing customer suspicions that he resembled the shooter.

His defense team argues against the admissibility of crucial evidence, claiming police conducted an unlawful search of his bag during the arrest, unearthing a 9 mm handgun and a notebook allegedly detailing violent intentions toward an executive.

With a judicial decision pending, Mangione remains adamant in his not guilty plea. The hearing, expected to last over a week, has attracted public interest, evidenced by supporters attending, some displaying slogans emphasizing civil rights.