The Manhattan district attorney is trying to put Mangione on trial twice for the same killing. The federal prosecution already exists; what the DA is now attempting is the second one.
The architecture that makes the attempt colorable is the dual-sovereignty doctrine the U.S. Supreme Court reaffirmed in Heath v. Alabama, 474 U.S. 82 (1985). A man already convicted of murder in Georgia was tried again in Alabama for the same killing; the Court allowed both convictions to stand, reading the Fifth Amendment’s Double Jeopardy Clause — which bars a second prosecution “for the same offence” — to mean the same offense under the same sovereign. New York and the United States count as separate sovereigns for that purpose. A federal guilty plea, by itself, does not bar a state prosecution for the same conduct.
What bars it here is the New York Constitution. Article I, section 6 — the state double-jeopardy clause — closes the second-prosecution door wider than the Fifth Amendment would. The New York Court of Appeals has applied that text through a “same transaction” test, articulated in People v. Abbamonte, 39 N.Y.2d 23 (1976), and developed in later decisions, that asks whether successive prosecutions arise from the same criminal transaction — broader than the federal Blockburger “same offense” test, which compares elements alone. The state test is the one that governs Mangione’s case, and it is the test the Manhattan DA’s office is now litigating against.
The state rule lives in two places. Article I, section 6 is the constitutional command. The Criminal Procedure Law gives the command teeth. CPL 40.20 provides that a person may not be “separately prosecuted for two offenses based upon the same act or criminal transaction.” The statute carries an exception, which the New York Court of Appeals has applied through a conjunctive two-prong formulation: successive prosecutions are permitted only where the offenses “as defined have substantially different elements” and “the acts establishing one offense are in the main clearly distinguishable from those establishing the other.” Both prongs must be satisfied for the bar to give way. The defense’s motion, filed promptly after the federal plea, runs on this provision. The state’s counter, whatever it becomes, has to satisfy both halves — different elements and distinguishable acts — or the bar holds.
What the federal plea did is the predicate for everything that follows. On 14 August, in Manhattan federal court, Mangione pleaded guilty to two federal stalking counts under 18 U.S.C. § 2261A and admitted he killed UnitedHealthcare chief executive Brian Thompson on a Midtown Manhattan sidewalk in December 2024. The federal statute requires travel in interstate or foreign commerce, or use of an interstate facility, with intent to kill, injure, harass, or intimidate, followed by conduct that places the victim in reasonable fear of death or serious bodily injury. The statute does not require intent to kill. A defendant can plead guilty to federal stalking by admitting intent to injure or intimidate and the resulting fear, without admitting the killing itself was intended.
The state murder charge is brought under New York Penal Law § 125.25, second-degree murder. The statute supports two theories. Section 125.25(1) requires intent to cause the death of another person, followed by that death — intentional murder. Section 125.25(2) requires that, under circumstances evincing a depraved indifference to human life, the defendant recklessly engage in conduct creating a grave risk of death to another person, and thereby cause the death — depraved-indifference murder. Both theories reach the same act: Mangione shot Thompson on a Midtown sidewalk. The federal plea describes that killing. The state charge describes that killing. The transaction is one.
The prosecution’s working theory has been previewed in the press, but the office has not adopted any specific legal theory in a filing on the dismissal motion itself. The closest the office has come on the record is a July letter filed in the state case before any plea — a submission on the consequences of any plea, not a brief on the merits of successive prosecution. The letter wrote that any plea “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.” That is a sentencing-and-victim-impact submission; it is not a different-elements argument. The post-plea statement from the office — that it “remains committed to seeking justice for Mr Thompson and his family” and is “prepared to litigate the defense motions” — is general. It adopts no specific legal theory on the record.
The different-elements argument, as it has appeared in public, comes from former prosecutors speaking about the case rather than from the office prosecuting it. Mark Chutkow at Dykema, Joseph McNally at McNicholas & McNicholas, Jeffrey Greco at Greco Neyland, Jeremy Saland, Maurice Johnson — former state and federal prosecutors now largely in defense practice — have read the same record and split. Most read the statute as foreclosing the state case. A few see a window. Chutkow himself describes the state’s possible argument as “relatively untested.” There is not an abundance of state appellate decisions on the precise posture.
The audit of the elements theory runs on three joints. First, the conduct the prosecution is parsing is one act. A man shot another man on a Midtown Manhattan sidewalk. Federal prosecutors charged two counts of stalking that describe that killing. State prosecutors now charge intentional or depraved-indifference murder for that killing. The two charges do not describe two events. They are two legal theories for one event. New York’s transactional double-jeopardy doctrine exists precisely so that a defendant can be made to face one trial, on one record — not two trials on two theories of the same incident. The second prong of the conjunctive test — that the acts be “in the main clearly distinguishable” — fails on its face.
Second, on the elements prong, the case for difference depends on which state theory the DA pursues. Federal stalking requires intent to kill, injure, harass, or intimidate. Intentional second-degree murder under § 125.25(1) requires intent to cause death. The federal statute’s broader intent element — kill, injure, harass, or intimidate — actually reaches conduct the state charge does not require; a federal plea to stalking does not establish intent to kill, and a Blockburger-style elements comparison favors the state on this branch. But New York does not run on Blockburger. The state test asks whether the transaction is one. And on the depraved-indifference theory under § 125.25(2), the state is not alleging intent to kill at all; it is alleging recklessness under circumstances of depraved indifference. The federal stalking plea does not foreclose that theory by its terms, but the conduct that produces both charges is the same conduct, and the conjunctive second prong — distinguishable acts — does the work.
Third, the practical architecture reinforces the legal one. The federal sentencing range disclosed by prosecutors spans 292 to 365 months — roughly 24 to 30 years — and the government has vowed to seek a life sentence at federal sentencing. The state exposure — a maximum of 25 years to life under New York law — adds, if the second prosecution proceeds, a second trial and a second round of courtroom exposure for Thompson’s surviving family. That is precisely the exposure New York’s transactional double-jeopardy rule was written to prevent. The defense’s motion is, by Chutkow’s description, “a Hail Mary” in the sense that New York appellate decisions on this precise posture are not abundant; the question sits among the less-traveled corners of state double-jeopardy doctrine. The motion’s odds and its merits are different questions.
The defense filed its motion to dismiss promptly after the federal plea. Judge Gregory Carro has scheduled a 10 December hearing, with briefing deadlines to follow. The trial that had been set for 8 September will not happen on that date. Carro will hear the question in December. The state will argue that two statutes describe two crimes. The defense will argue that one act is one act.
Whoever loses will have arguments left to make. Mangione is going to prison for a long time. The December hearing answers whether Manhattan prosecutors get to make him go twice.