Legal experts assess double-jeopardy path for Mangione state murder case

Prosecutors weigh stalking-versus-murder distinction as defense seeks dismissal

Justice Gregory Carro of the New York Supreme Court issued a brief written order on Monday canceling jury selection in the state murder case, which had been set to begin September 8. The order gives both sides deadlines to file their legal arguments about dismissal.

Mangione’s defense team filed the motion to dismiss on August 14, the day he entered his federal guilty plea to two federal stalking counts in the December 2024 killing of UnitedHealthcare CEO Brian Thompson on the streets of Manhattan. The lawyers argued under New York’s statutory prohibition against successive prosecutions for the same conduct, asserting that Mangione “should not have to be punished for the same conduct twice,” according to the Guardian’s account of the filing.

Most legal observers interviewed by the Guardian said New York courts are likely to apply that bar to the state murder charge, leaving prosecutors with narrow options for keeping the case alive.

Mark Chutkow, a former federal prosecutor who now practices white-collar defense at the firm Dykema, said Mangione’s path is narrowing even as he seeks to avoid the state case. “At this point, it seems like his goal is to try to get out of prison sometime in his 50s, but even that path is narrowing as we speak,” Chutkow said. “He’s trying to do the best with the hand that he has, and it’s a difficult hand.”

Chutkow said the defense may have calculated that a federal judge would impose a more lenient sentence than Carro, who could mete out a maximum 25 years-to-life sentence if Mangione were convicted at the state trial. The legal community has described Carro as “fairly tough on crime, fairly sympathetic to victims,” Chutkow said.

Federal prosecutors disclosed in court that a sentencing range under federal guidelines would span from 292 to 365 months, though they vowed to seek a life sentence at Mangione’s federal sentencing.

Joseph McNally, a former federal prosecutor who now directs emerging litigation at McNicholas & McNicholas, said he expects Mangione will receive a life sentence — or something close — in the federal system. Even if a state conviction could yield a similar outcome, he said, federal custody is typically preferable for inmates serving long terms.

“Serving out long-term imprisonment, including life imprisonment, it’s typically better and safer for an inmate to be in federal prison than state prison,” McNally said. “If you ask somebody: would you rather serve your time in state custody or federal custody? An inmate would say that they’d rather serve their sentence in federal custody.”

Jeffrey Greco, a former prosecutor who now helms defense firm Greco Neyland, put the choice in similar terms. “At the end of the day, there is a very good chance Mangione is still doing life in prison,” Greco said. “The only difference: is he doing it in a federal lockup, or is it a state facility upstate?”

The Manhattan District Attorney’s office has signaled it will press the case forward. In a post-plea statement, the office said: “While federal sentencing is pending, we are prepared to litigate the defense motions. The Manhattan DA’s office remains committed to seeking justice for Mr Thompson and his family.”

Jeremy Saland, a defense attorney who worked as a prosecutor in the Manhattan district attorney’s office, explained that while state and federal authorities are typically permitted to pursue parallel cases, New York’s double-jeopardy law prohibits prosecuting someone in state court for the same conduct that already produced a conviction, when it stems from “the same underlying criminal transaction.”

“But, there are some exceptions,” Saland said. “Are the elements of the crime different? What harm is the legislature trying to protect against with state laws? If they’re different and there’s different elements, then is there a window to say you know what, this would be the exception to the double jeopardy.”

Saland said he expects the Manhattan DA’s office to focus on the distinction between the elements of stalking and second-degree murder, and on the type of harm each statute targets. “You have one that is an intentional murder, meaning: ‘I intentionally sought to kill you. This was my purpose and goal.’ And that would be the state. Whereas on the federal level, it’s different. You’re stalking someone and as a result, that causes death, but it was not your intent, as per the statute, to murder that person.”

While Mangione admitted to killing Thompson at his federal plea hearing, “he did not say, nor was it required by the statute, that he intentionally killed Brian Thompson,” Saland said.

Maurice Johnson, a former prosecutor with the Manhattan district attorney and federal prosecutor in south Florida, now a partner at Lewis Brisbois Bisgaard & Smith, voiced similar expectations about how prosecutors may proceed.

“I think what the prosecution is going to argue is: your honor, this defendant pled guilty to stalking in the federal system. We are charging him with second-degree murder and other charges,” Johnson said. “These are separate elements so technically, these are not the same offense. It may be stalking there, but it’s murder here.”

Johnson, however, said he believes Mangione will likely be able to avoid state charges, because the admission to killing Thompson in the federal plea overlaps with the state murder charge.

Chutkow pointed to a July letter filed by Manhattan state prosecutors as evidence that the office had been laying the groundwork for that argument before the plea was entered. In that letter, prosecutors said any guilty pleas “must account for the seriousness of defendant’s offenses, the loss of an innocent life, the impact of those crimes on the victim’s family, and the other state interests that are implicated, including the sanctity of life principle that underpins the state homicide charges.”

“I do think that the state does have a pretty good argument here, but this is relatively untested,” Chutkow said, noting that there is not an abundance of state appeals court decisions that would readily settle the issue. “There hasn’t been a lot of case law, and so I think the Mangione team is, in essence, throwing up a Hail Mary to see if they can land that touchdown by getting the state prosecution barred.”

The postponement and the December 10 hearing follow Justice Carro’s earlier cancellation of jury selection in the state case, developments that build on MSI’s prior coverage of the trial postponement and MSI’s account of the August 14 federal guilty plea.