In recent hearings held in New York, the spotlight was on the arrest of Luigi Mangione in Pennsylvania, particularly focusing on his backpack. His legal team is striving to have certain pieces of evidence dismissed, questioning the legality of the procedures followed during his arrest.

Defense attorneys for Mangione scrutinized the actions of Pennsylvania police, disputing the legitimacy of the warrantless search of Mangione’s backpack and the delay in administering his Miranda rights. These pre-trial hearings aim to decide if such evidence will be barred from the trial concerning the alleged murder of UnitedHealthcare CEO Brian Thompson.

Neama Rahmani, a former federal prosecutor, shared with Fox News Digital that he is confident the prosecution will demonstrate that both the backpack search and the delivery of Miranda rights were conducted lawfully.

“I concur with the prosecution’s stance that the search was lawful,” Rahmani stated. “Exceptions to the search warrant requirement exist, notably a search incident to an arrest or an inventory search, both of which necessitate an arrest. Provided there was probable cause, law enforcement had the right to search anything within Mangione’s immediate reach,” he explained.

Luigi Mangione appeared in Manhattan Criminal Court on December 12, 2025, with a downward gaze. (Jane Rosenberg)

Luigi Mangione, charged with the murder of Brian Thompson, the CEO of United Healthcare, appears in State Supreme Court in Manhattan during an evidence suppression hearing in his case on Friday, Dec. 12, 2025. (Curtis Means for Daily Mail via Pool)

Luigi Mangione, charged with the murder of Brian Thompson, the CEO of UnitedHealthcare, appears in State Supreme Court in Manhattan during an evidence suppression hearing in his case on Friday, Dec. 12, 2025. (William Farrington for New York Post via Pool)

However, if Judge Gregory Carro rules against prosecutors and excludes evidence from the backpack, Rahmani said it could be “very damaging” to the case.

“So that could be potentially fatal to the prosecution’s case. They’d have to rely just on the video, the DNA at the scene, eyewitness testimony, fingerprint evidence,” he said. 

Here’s what was presented in court over the past week:

Contents of Mangione’s backpack and pockets:

• Map – Mangione had a to-do list that had an escape plan for travel from Pittsburgh, Pennsylvania to Cincinnati, Ohio.

Photo evidence showing the possessions of Luigi Mangione during the arrest for the assassination of UnitedHealthcare CEO Brian Thompson. Pictured: Mangione’s plan for an escape route from Pittsburgh to Cincinnati. (Manhattan District Attorney’s Office)

Photo evidence showing the possessions of Luigi Mangione during the arrest for the assassination of UnitedHealthcare CEO Brian Thompson. Pictured: Mangione’s planned escape route with clothing notes. (Manhattan District Attorney’s Office)

• Handgun and multi-tool pocketknife.

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: Mangione’s pocket knife, zip ties and a tool. (Manhattan District Attorney’s Office)

• Identification, banking cards and other personal hygiene products.

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: Mangione’s passport, driver’s license, debit and credit cards, and a wallet. (Manhattan District Attorney’s Office)

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: Mangione’s toiletry items. (Manhattan District Attorney’s Office)

• Notebook and flash drives.

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: Mangione’s manifesto. (Manhattan District Attorney’s Office)

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: Mangione’s memory card, headphones, and batteries. (Manhattan District Attorney’s Office)

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured:Mangione’s wireless cards, and SIM card. (Manhattan District Attorney’s Office)

Evidence collected after the arrest of Luigi Mangione and presented by the Manhattan DA during a suppression hearing is shown here. Pictured: USB. (Manhattan District Attorney’s Office)

Body camera video of Mangione’s confrontation with police before he was arrested:

WATCH: Police confront Luigi Mangione before arrest

Prosecutors released body camera video showing the moments before Mangione was arrested at a McDonald’s in Altoona, Pennsylvania.

When Mangione was arrested on Dec. 9, 2024 at the McDonald’s, a police officer said they got a call that he looked “suspicious.”

“I’m sorry,” Mangione told the police officer before looking down at his phone. Mangione identified himself as “Mark Rosario” during the interaction and handed over an ID.

According to the officer, the person who reported Mangione to authorities did so because they “thought [he] looked like someone.”

“I’m a manager at Plank Road McDonald’s out here on the boulevard,” a McDonald’s manager told the 911 dispatcher. “And I have a customer here, that some other customers were suspicious of, that he looks like the CEO shooter from New York.”

During the interaction with police, Mangione was asked, “Why are you lying about your name?”

Luigi Mangione talks with a police officer in Altoona, Pennsylvania. (Manhattan District Attorney’s Office)

“I clearly shouldn’t have,” Mangione said.

When Altoona Police Officer Stephen Fox asked Mangione if he was using a fake ID, the suspect shook his head up and down, according to video shown in court.

Fox testified that he felt “uneasy” while patting down Mangione because of the way he was sitting and not making eye contact.

Mangione was taken into custody in Pennsylvania on charges relating to false identification.

Luigi Mangione speaks to a police officer in Altoona, Pennsylvania. (Manhattan District Attorney’s Office)

Altoona Police Lt. William Hanelly was also seen in the body camera video telling Mangione that he’d be in even more trouble if he continued using a fake name with officers.

Officer testimony:

Hanelly also claimed that a warrant wasn’t needed to search Mangione’s bag, saying it was a warrant exception.

Video shown in court from Mangione’s arrest at the McDonald’s shows one police officer saying, “We probably need a search warrant at this point.”

Another officer responded, “It doesn’t matter. He is under arrest for a crime here, so we can search,” referring to the arrest of Mangione for allegedly possessing a fake ID.

Mangione’s attorney, Karen Friedman Agnifilo, argued the backpack search was illegal and is attempting to exclude that evidence from trial.

Altoona Police Officer Christy Wasser was seen on body camera video shown in court pulling out wet underwear from Mangione’s backpack that had a magazine with bullets inside it.

“There was another magazine hidden in his underwear,” Wasser can be heard saying.

Luigi Mangione, charged with the murder of Brian Thompson, the CEO of UnitedHealthcare, appears in the State Supreme Court during an evidence suppression hearing in his case, in Manhattan, New York, Dec. 11, 2025.  (Curtis Means/Pool via Reuters)

As Wasser held up the magazine with bullets inside, someone can be heard saying, “it’s f—— him.”

Mangione’s defense team has also argued that police waited too long to read the suspect his Miranda rights. When Fox took the stand, he explained that he didn’t initially tell Mangione he was in custody to get the suspect to talk.