Luigi Mangione scored a partial victory on Monday after a judge threw out some of the key evidence recovered during his arrest - but ruled jurors will still be allowed to see his alleged 'manifesto' and the 9mm ghost gun at his murder trial. Judge Gregory Carro decided the jury will be shown the notebook that was found in Mangione's backpack by police in which the Ivy League graduate allegedly wrote that he wanted to 'whack' a senior figure in the health insurance industry.The 9mm 'ghost gun' found inside Mangione's backpack - the alleged murder weapon - will also be allowed into evidence, the judge ruled.However, other items such as a magazine of bullets wrapped in underwear, a cellphone, passport, and wallet will not go before the jury.In his ruling, the judge also said that statements by Mangione to a prison guard in a Pennsylvania jail that he had a 3-D printed gun in his backpack were admissible.As the ruling was read out Mangione, who was wearing a suit as he sat at a bench with his lawyers, did not appear to react. The mixed ruling is both a win and a setback for Mangione in his New York state case over the alleged fatal shooting of UnitedHealthcare executive Brian Thompson outside a hotel in Manhattan in December 2024.Mangione, who turned 28 earlier this month, has pleaded not guilty to murder in the second degree and to weapons charges along with possession of a forged instrument. Luigi Mangione appeared in court on Monday as a judge ruled on whether key evidence from his arrest can be shown to jurors Mangione, pictured in a court sketch in April, is accused of fatally shooting UnitedHealthcare executive Brian Thompson in December 2024He is due to go on trial in September.Late last year, Judge Carro held a nine-day hearing to determine what evidence could be allowed after Mangione's lawyers claimed his constitutional rights against illegal search and seizure were violated.They claimed that police in Altoona, Pennsylvania, did not have a warrant to search Mangione when he was arrested at a McDonald's in the town five days after the December 4 shooting.Among the contents of the bag was a red notebook which prosecutors called a 'manifesto' while Mangione's lawyers have referred to it as a 'journal.'Writing in October 2024, Mangione said he wanted to 'whack' the chief executive of an insurance company at its annual 'bean counter conference'.Six weeks later Thompson, 59, a father-of-two, was shot outside the Hilton Midtown during a UnitedHealthcare conference.During Monday's hearing, Judge Carro told the court that police in Altoona conducted an 'improper, warrantless search' of Mangione at the local McDonald's. That meant the magazine, cellphone, passport and wallet which were found at that point will not be allowed in as evidence.However, once the officers took Mangione to the police station they carried out a 'valid inventory search', the judge said.That means the gun, silence and the manifesto, which were discovered at the police station, will be allowed in. Judge Gregory Caro will rule on whether prosecutors can show the jury the contents of Mangione's backpack when he was arrested in December 2024. A backpack recovered by police in Central Park during the investigation The 28-year-old Ivy League graduate was charged with murder in the second degree and weapons charges along with possession of a forged instrument, all of which he denies, over the death of United Healthcare CEO Brian ThompsonThe judge also ruled that any statements made by Mangione before he was technically in custody were not admissible.The judge ruled that the cutoff was eight minutes after the first officers spoke to Mangione.Up until that point, Mangione admitted to one cop that he shouldn't have given him a fake ID with the name 'Mark Rosario' on it.That admission will not be allowed as evidence, the judge ruled.Monday's hearing drew a crowd of supporters of Mangione outside the courthouse. Speaking after the ruling, one supporter, Shelby Syed, 32, a med student, said: 'I don't think it's fair, but it's out of my hands.'If you're going to dismiss the (evidence) found in the McDonald's why don't you dismiss the evidence found in the police station?'He can still win the case because he's innocent. It's a little setback but we're going to keep on fighting.' According to prosecutors, a journal entry from October 2024 allegedly described the investor conference as 'a true windfall.' The journal stated: 'It embodies everything wrong with our health system'.In another entry from August 2024, Mangione allegedly wrote: 'I finally feel confident about what I will do. The details are coming together.'And I don't feel any doubt about whether it's right/justified. I'm glad-in a way-that I've procrastinated bc it allowed me to learn more about (UnitedHealthcare). UnitedHealthcare CEO Brian Thompson was gunned down on his way to a conference in Manhattan in 2024 CCTV footage release by NYPD at the time showed the suspect, Mangione, leaving the scene with a backpack on a bike 'The target is insurance. It checks every box.'The other items in the backpack included a 9mm 'ghost gun', or a 3D printed firearm with no serial number, a loaded gun magazine wrapped in a pair of underwear and silencer.Police who arrested Mangione said that the bullets in the magazine convinced them he was the killer.According to prosecutors, the bullets used to kill Thompson had the words 'delay', 'deny' and 'depose' written on them in reference to the language used to deny health insurance claims.Mangione recently caught a break in the separate federal case, which is taking place in New York in a courtroom a few blocks from the state court.US District Judge Margaret M. Garnett dismissed four of the federal counts including murder through the use of a firearm and a related firearms offense.Critically, the dismissal of the murder charge meant Mangione is no longer eligible for the death penalty.Mangione still faces two counts of interstate stalking, which carry a maximum sentence of life in prison without parole.The federal case is due to go on trial next year once the state matter is concluded.Mangione is currently being held at the grim Metropolitan Detention Center, a federal prison in Brooklyn whose previous inmates included R. Kelly and Diddy.Ahead of his hearing on Monday, Judge Garnett ordered the Bureau of Prisons to make sure Mangione could wear civilian clothes.She said that he has to be given a suit, one shirt, a pair of socks and a pair of shoes, but no laces.