What does the judge's ruling on evidence mean for the Luigi Mangione case?

A New York judge issued a mixed ruling last week, throwing out some items found in Luigi Mangione's backpack from his murder trial.

However, crucial evidence will still be admitted, paving the way for a solid defense against Mangione, according to legal experts, and raising questions about what kind of defense he might present to the jury.

Monday's decision divided the evidence into two main categories: items found in an initial search of Mangione's backpack at a McDonald's in Pennsylvania days after the murder of UnitedHealthcare CEO Brian Thompson, and those found in a later search of the backpack at the Altoona police station.

New York Judge Gregory Carro agreed with Mangione's defense team that the first search by local police was inadequate and prohibited the items seized from that occasion from being used in Mangione's murder trial.

The latest search correctly followed department protocols, Carro ruled, allowing prosecutors to present evidence that is essential to the case - the alleged murder weapon and a diary full of notes that authorities called a "manifesto."

"If the prosecution had to choose, without regard to the law, which pieces of evidence they would like to admit at trial, it would be the gun and the notebook," Gary Galperin, a former prosecutor who spent more than 40 years at the Manhattan District Attorney's Office, told CNN.

"These two pieces of evidence are so incriminating and so crucial," he added.

Mangione is charged with second-degree murder, possession of a forged document and seven weapons charges in connection with the death of Thompson, who was killed on the morning of December 4, 2024, while walking to the Midtown Manhattan hotel hosting his company's annual investor conference.

Mangione, 28, also faces a federal charge in connection with Thompson's death, as well as state charges in Pennsylvania.

The New York state case is expected to be the first to go to trial, with jury selection set to begin in September. He has pleaded not guilty to all charges.

Mangione's defense argued that all evidence from the backpack should be excluded because Altoona police illegally searched his backpack, prompting the judge to hold a nine-day evidence suppression hearing late last year.

Although controversial, Carro's decision represented a victory for the Manhattan District Attorney's Office, which appears to have a strong case, legal experts told CNN.

And when combined with the statements Mangione allegedly made to authorities after his arrest, the strong physical evidence could narrow his defense options at trial.

"If the gun and notebook were suppressed [...] that would make the case very different," said Galperin.

Video shows police approach to Luigi Mangione in the USA | CNN BRAZIL

What was in the backpack?
A gun
Carro's ruling on Monday will allow prosecutors to show jurors the weapon they say was used to shoot Thompson twice in the back: a 3D-printed 9mm handgun recovered from Mangione's backpack at the Altoona police station.

Steve Wasserman, an associate professor at the John Jay College of Criminal Justice, described the weapon as "crucial," telling CNN, "It could really eliminate any doubt in some jurors' minds."

Investigators said they seized this 9mm firearm from Luigi Mangione's backpack when he was arrested in December 2024 - New York County District Attorney's Office via CNN Newsource
In fact, prosecutors have claimed in court documents that the gun matches 9mm shell casings found at the crime scene - making it a key piece of evidence that could link Mangione to the shooting.

Prosecutors said two shell casings and one live round of ammunition were found at the crime scene, each containing a word that appears to reference a critique of the insurance industry's tactics - "delay," "depose" and "den."

"If there is strong forensic evidence linking this gun to the crime, (the defense) will have a difficult job," Wasserman said.

A notebook
The notebook, in turn, contains several handwritten notes expressing animosity toward the health care industry and the intention to commit an attack, the District Attorney's Office alleges - notes that could help prosecutors illustrate Mangione's alleged motive, according to Wasserman.

"So, let's say you want to rebel against the deadly and greedy health care cartel. Do you bomb the headquarters? No," Mangione wrote in a note dated October 2024, according to a document from prosecutors.

A red notebook was also found in Luigi Mangione's backpack at the time of his arrest, according to prosecutors - New York County District Attorney's Office via CNN Newsource
Instead, "eliminate the CEO at the annual convention of parasite accountants," he reportedly wrote, in an apparent reference to the investor conference Thompson was attending when he was murdered.

Although motive is not an element that prosecutors need to prove to establish a defendant's guilt beyond a reasonable doubt, it often gives jurors yet another reason to convict him.

In Mangione's case, Wasserman said, "it certainly gives a lot of credibility and plausibility to why someone would stalk and kill a complete stranger."

Prosecutors may also present other writings found in Mangione's bag, separate from the notebook, including a letter addressed "To the Feds" that they considered a confession, according to court records.

"To avoid a lengthy investigation, I clearly state that I was not working with anyone," Mangione reportedly wrote in the letter, which once again expressed frustration with the American healthcare system.

"I apologize for any conflict or trauma, but it was necessary," he reportedly wrote.

"Frankly, these parasites deserved what happened," he said.

What was disclosed
With the prosecution's presentation likely focused on the writings and the alleged murder weapon, Carro's exclusion of other items from the backpack may not have a major impact on the prosecution's case.

The prosecution will not be able to show jurors a cell phone, passport and wallet that were inside a Faraday bag - which blocks cell phone signals - as well as a computer chip.

Investigators seized a passport and wallet, among other items, when Luigi Mangione was arrested in December 2024 - New York County District Attorney's Office via CNN Newsource
An ammunition magazine found wrapped in underwear, according to police body camera footage, is also inadmissible, according to Carro's ruling. That charger is linked to one of the weapons charges in the state complaint against Mangione, raising the possibility that that charge will be dropped from the case.

Even with these items discarded, prosecutors can still present similar evidence to the jury, including electronic evidence, which Galperin says is "fertile ground in terms of building and proving cases."

"If the prosecution, independently and through other legal processes, obtained electronic evidence, it remains valid," the associate professor at the Cardozo Faculty of Law told CNN.

The Public Prosecutor's Office said in court documents that it has other electronic devices found separately from Mangione's backpack, including a blue Motorola cell phone discarded by the shooter as he fled the scene and a flash drive that Mangione wore on a chain around his neck at the time of his arrest. Authorities have not released any information about the content found on these devices.

Prosecutors also pointed to evidence outside the scope of Carro's decision on Monday that they say links Mangione to the crime.

Investigators tracked the shooter's movements using security camera footage, which led them to a New York hostel where he stayed using a fake New Jersey driver's license under the name Mark Rosario. Mangione presented a fake New Jersey driver's license with the same name to Altoona police when he was first approached at McDonald's, officers testified.

Mangione's DNA or fingerprints were also found on several items discarded by the shooter, including a water bottle, a cellphone and a snack wrapper, according to court records. The water bottle and snack wrapper were found in a trash can near the crime scene, prosecutors said.

What the ruling could mean for Mangione's defense
Attorneys say typical defenses may not be available to Mangione due to the apparent strength of the physical evidence against him.

If Carro had chosen to suppress the gun and notebook as evidence, it's possible that Mangione could have presented a defense focused on the allegation of mistaken identity, Galperin said.

But with those elements in play, he said it seems likely that Mangione's team will try to present a psychiatric defense - arguing, for example, that he killed Thompson during an episode of extreme emotional disturbance.

Usually, under this defense, the defendant argues that they committed a crime because they were suffering from an extreme emotional disturbance for which there could be an explanation, such as finding their spouse in bed with someone else. When successfully argued, the defendant is not acquitted of murder, but rather found guilty of manslaughter, which carries a lighter sentence.

Mangione's lawyers have not said publicly whether he will seek psychiatric defense. But last August, they asked the judge for more time to notify the prosecution if they intended to do so. It is unclear what the status of this request is.

But in Mangione's case, the chance of such a defense being successful is "close to zero," said New York criminal defense attorney Jeffrey Lichtman, who has represented John Gotti Jr. and Mexican drug trafficker Joaquín "El Chapo" Guzmán.

"He was so lucid before and after the crime," Lichtman said of Mangione. "There is nothing to suggest to the jury that he lost control for a moment. There is a lot of planning involved," he added.

Indeed, another point from last week's Carro decision could offer prosecutors an effective rebuttal: Mangione's alleged statements to Pennsylvania law enforcement.

Mangione's defense team pushed for his alleged statements to police between the McDonald's encounter and his extradition on December 19, 2024 to be barred, arguing that police violated his right to legal assistance and failed to properly read him his Miranda rights before questioning him.

The judge ruled that most of the alleged statements were admissible, although he rejected some comments made by Mangione during his arrest, including his admission that he had given a false identity document to police.

But Carro's decision will allow the Manhattan District Attorney's Office to present other alleged statements at trial.

A corrections officer testified at last year's hearing that he had informal conversations with Mangione about a variety of topics, including the differences between the private and public health care systems, as well as media coverage of the case. Another prison officer said Mangione told him he was carrying a backpack with foreign currency and a 3D-printed gun at the time of his arrest.

"That's part of the whole web of evidence against him," Galperin said.

"He was very objective, very thoughtful, he didn't say anything that really indicates that he killed in a state of extreme emotional disturbance," he added.

Source: CNN