Luigi Mangione entered a guilty plea in his federal case at a court appearance in Manhattan Friday morning, admitting to the judge that he shot and killed\u00a0UnitedHealthcare CEO Brian Thompson\u00a0outside a Midtown hotel in 2024.Mangione, 28, faced both federal and state trials in New York for the deadly shooting. He had previously pleaded not guilty in both cases.Sentencing in the federal case will take place on Dec. 18, with Mangione facing a maximum possible sentence of life in prison.His state trial is currently set to begin in September. Mangione\u0027s defense team said they\u0027ve filed for state charges to be dismissed under New York\u0027s double jeopardy law, and the Manhattan DA\u0027s office said they\u0027re prepared to fight their move for dismissal.\u00a0What happened in courtThompson\u0027s family arrived in the courtroom at around 10:50 a.m. The hearing, which had been set to start at 11 a.m., got started a bit late. The courtroom had filled with press personnel as well as about two rows of members of the public.\u00a0Mangione entered the court at around 11:10 a.m. with his feet shackled and his hands behind his back. He was wearing tan prison clothing with a white T-shirt underneath.\u00a0Just before 11:15 a.m., Mangione\u0027s defense team told the judge Mangione "is prepared to plead guilty to the indictment at this time."\u00a0The judge asked Mangione if that was correct.\u00a0"Yes," Mangione told the judge.\u00a0The judge then asked Mangione a series of questions about his background and use of medications and drugs. The judge then found Mangione to be fully competent to enter the plea.\u00a0The judge told Mangione that the maximum possible sentence is life in prison followed by supervised release. The judge added that there\u0027s no parole in the federal system, although good behavior and other programs can impact how long he will spend in prison. He will be required to serve 85% of the sentence, the judge said.\u00a0The judge pointed out that there\u0027s no plea agreement between the defense and prosecution, and Mangione\u0027s defense attorney said that\u0027s correct.\u00a0Mangione\u0027s admission in courtMangione then told the court in his own words what he did.\u00a0He told the court that he had for years endured severe pain for a broken back and had navigated the health insurance system. He told the court he learned about the UnitedHealthcare annual investor conference in New York even though it wasn\u0027t publicized, and traveled to it. He told the court he posed as an investor to find out more information about the conference.\u00a0He told the court he used a 3D printer to make parts of the gun, and traveled to New York with the gun, silencer, and magazine with "the intent to shoot Brian Thompson."\u00a0He said he shot Thompson in Manhattan knowing it would place him in fear of death or serious bodily injury.\u00a0Prosecutors then spoke in court, reviewing the evidence against Mangione. They pointed to video capturing the shooting, as well as Mangione fleeing the scene on the bicycle, his arrest in Altoona, Pennsylvania, the recovered pistol and shell casings, as well as DNA found at the crime scene. Prosecutors said entries in Mangione\u0027s notebook expressed his desire to kill a health care executive.\u00a0"Mr. Mangione, how do you now plead to counts one and two of the indictment?" the judge asked.\u00a0"Guilty," Mangione said.\u00a0"I will accept your guilty plea," the judge said.\u00a0About the chargesMangione initially faced four federal charges in Thompson\u0027s killing. Two of those charges against him, one of which brought the possibility of the death penalty \u2014 murder through use of a firearm and an additional firearms charge \u2014\u00a0were dismissed earlier this year, and federal prosecutors said they would not appeal that decision.That left federal stalking charges against him, which brought the possibility of life in prison without the possibility of parole.Jury selection in the federal case had been set to begin in January.\u00a0Speculation about a possible plea deal had been rampant since Tuesday, when prosecutors and Mangione\u0027s defense team sent a letter to the court\u00a0requesting a Friday conference regarding the federal case.Luigi Mangione\u0027s state trial and double jeopardy concernsMangione\u0027s attorney Karen Friedman Agnifilo spoke after Mangione entered his guilty plea to federal charges.\u00a0"Despite this being a single isolated event, Mr. Mangione has been unfairly treated since the outset in every way, and has successfully fought off terrorism charges and the death penalty, while also fighting at the same time two simultaneous prosecutions in two jurisdictions who are trying to punish him twice for the exact conduct," Agnifilo said. "New York law does not permit a person to be prosecuted and punished twice for the exact same crime under a statute that covers successive prosecutions, it\u0027s also known as the double jeopardy law."Today\u0027s guilty plea triggers this statute, and we just filed our motion in state court explaining why the state charges must be dismissed under New York\u0027s double jeopardy protections," Agnifilo said.\u00a0Manhattan District Attorney Alvin Bragg\u0027s office released a statement after the guilty plea saying they\u0027re going to fight to keep their prosecution going.\u00a0"Since December 2024, the Manhattan D.A.\u0027s Office has been tirelessly preparing to pursue a trial conviction in New York State Supreme Court for the alleged cold-blooded murder of Brian Thompson. We are encouraged that Mr. Thompson\u0027s family received a measure of accountability today.\u00a0 While federal sentencing is pending, we are prepared to litigate the defense motions. The Manhattan D.A.\u0027s Office remains committed to seeking justice for Mr. Thompson and his family," a spokesperson for the Manhattan DA\u0027s office said.\u00a0Mangione\u0027s state trial is\u00a0set to beg...