N.Y. Sup. Ct., New York Cty., Part 32 · Ind. No. 75657‑24 · S.D.N.Y. · No. 1:25‑cr‑00176
The killing, and the arrest
Five days and some two hundred and eighty miles. Almost everything the rest of the case argues about was in a backpack in Altoona.
Prosecution The side bringing the charges
The State of New York
A criminal case in New York is brought in the name of the People, which just means the state. The lawyers are from the Manhattan District Attorney’s Office, which Alvin Bragg runs, because the killing happened in Manhattan. They aren’t the only ones who charged him. The federal government did too, and so did a county in Pennsylvania, where he was arrested.
Background: Manhattan District Attorney
Defendant The person charged
Computer science graduate
He was 26 when he was arrested. He grew up outside Baltimore, Maryland, in a wealthy family whose businesses there include country clubs and a care home company. He finished top of his class at a private school in 2016, then took a bachelor’s and a master’s degree in computer science at the University of Pennsylvania. After that he worked remotely as a data engineer for a car-buying website and lived for a while in Hawaii, where he hurt his back.
Background: Britannica
Dec 4, 2024
Brian Thompson, fifty years old and the chief executive of UnitedHealthcare, is shot dead on the sidewalk outside a midtown Manhattan hotel, early in the morning, on his way into his company’s investor conference. He leaves a wife and two sons.
Dec 9, 2024
Luigi Mangione, twenty-six, is arrested in Altoona, Pennsylvania, after a customer recognizes him. Officers find a backpack. Inside it: a firearm fitted with a silencer, a loaded magazine, a forged New Jersey driver’s license, a passport, a phone, and a red spiral notebook of handwritten entries.
Every item on that list is litigated in two courts over the following eighteen months, and the two courts do not agree. The order in which the officers looked in the bag — at the counter, or later at the station on an inventory form — is the whole of the dispute, and it is the kind of question that only gets asked because a federal court and a state court were both asking it.
Charged in three places
Within eleven days he is a defendant in a state court, a federal court, and a Pennsylvania county court. Only one of those three ever gets near a jury.
Dec 17, 2024
A New York County grand jury returns murder in the first degree in furtherance of an act of terrorism, murder in the second degree as a crime of terrorism, murder in the second degree, seven weapons counts, and one count of possessing a forged instrument. Signed by District Attorney Alvin L. Bragg Jr.
Counts one through ten are each pleaded as having happened “on or about December 4, 2024.” Count eleven is not: the forged New Jersey license is pleaded as “on or about November 24, 2024,” ten days before the killing. Nobody had reason to care about that difference for another twenty months. It is now the reason one count of this indictment is going to outlive the other ten whatever happens.
Indictment, No. 75657-24 (N.Y. Cty. Sup. Ct.), counts 1–11
Dec 18, 2024
The United States charges him separately in the Southern District of New York: interstate stalking, stalking by electronic communication, murder through use of a firearm, and a firearm-and-silencer count. The first two are the ones that matter in the end; at this point they look like the small ones.
Dec 19, 2024
Brought to New York and presented in the federal court the same day. Detention on consent, without prejudice. He is held at the Metropolitan Detention Center in Brooklyn, in federal custody, for the whole of what follows — which is why, later, a federal judge has to order that he be allowed a suit to wear to a state court hearing.
Dec 2024
Pennsylvania charges him over the arrest itself: forgery and carrying a firearm without a license, both felonies, plus tampering with records, possessing an instrument of crime, and giving a false identification to police.
It never moves. The federal courts decline repeatedly to produce him in Pennsylvania, citing cost and security; a hearing set for November 2025 is canceled when he will not appear remotely. A Blair County judge treats his unavailability as a waiver of Rule 600, Pennsylvania’s speedy-trial rule, and orders the case reported on every sixty days. It is still open and has never been tried. This page does not track it further.
The capital question
For ten months the federal case is a death penalty case. It stops being one on a point of statutory construction that has nothing to do with what happened on West 54th Street.
Feb 4, 2025
Because the federal case is capital, the court appoints Avraham Moskowitz at public expense under 18 U.S.C. § 3005, alongside the retained team of Karen Friedman Agnifilo, Marc Agnifilo and Jacob Kaplan. The appointment is a reliable marker of what the case is: it arrives when the case becomes capital and it is withdrawn when it stops being one.
Apr 11, 2025
The defense asks the court to bar the government from seeking death before the government has said it will. The motion is later denied as moot, without prejudice, once the notice actually arrives.
ECF No. 16
Apr 17, 2025
Counts One and Two: stalking, by interstate travel and by electronic communication, each with death resulting, each carrying a maximum of life. Count Three: murder through use of a firearm, 18 U.S.C. § 924(j). Count Four: use of a firearm, brandished, discharged and silenced, § 924(c). Count Three is the only count in any of the three cases that could carry a death sentence.
ECF No. 22
Apr 24, 2025
Filed the day before the arraignment.
ECF No. 25
Apr 25, 2025
Not guilty on all four counts. The court sets a motions schedule and says what it intends to do about the trial date, in terms the parties go on quoting back to it for the next year.
“But my goal will be to leave that December 5 conference with a firm trial date set for 2026,” and “barring some request otherwise, my intention is that we will set a schedule for this case as if it’s the only case.” It was not the only case, and the second half of that sentence is what the fight over who goes first is about.
4/25/25 Tr. at 12, 17, quoted at ECF No. 108
The state case narrows
The terrorism theory does not survive the first serious look at it, and with it goes any possibility of life without parole in New York.
May 2025
The defense moves in state court to suppress the backpack and his statements, to bar identification testimony from witnesses who had grown familiar with surveillance footage, to dismiss the terrorism counts as unsupported by the grand jury evidence, and to dismiss the whole case on double jeopardy and constitutional grounds.
Worth marking clearly, because it is the single most misreported thing about this case: the double jeopardy argument is not new, and it did not arrive with the plea. It was made here, in May 2025, and it lost. It lost because New York’s statute bars a second prosecution, and in May 2025 there had not yet been a first one that ended in anything. The argument was not wrong. It was early.
Sept 16, 2025
Counts one and two are dismissed. The court finds nothing in the grand jury record establishing the element the terrorism statutes require — an intent to intimidate a civilian population or to coerce a government.
“There was no evidence presented that the defendant made any demands of government or sought any particular governmental policy change, let alone that he did so by intimidation or coercion.”
The practical effect is a sentencing one. Murder in the first degree in New York carries life without parole; murder in the second degree carries twenty-five years to life, and is parole-eligible. From this date forward the state case is the less severe of the two in its maximum exposure — the federal stalking counts each carry life — which is worth holding onto, because it makes the plea eleven months later harder to read as simple damage control.
Decision and order, Sept 16, 2025, Part 32
Sept 20, 2025
In the federal case, the defense moves to dismiss on the basis of public statements by senior Department of Justice officials, attaching a press release and an Instagram post by the Attorney General as exhibits.
ECF No. 51, Exs. 1–2
Sept 24, 2025
The court finds that statements by two high-ranking Department staff, including within the Office of the Attorney General, “appear to be in direct violation” of Local Criminal Rule 23.1 and of its own April order, and orders a sworn declaration explaining how it happened.
The order requires the declaration to come from “a person of suitable authority” — naming the Acting U.S. Attorney as the floor, “if not an official at Main Justice” — and directs the government to advise the Deputy Attorney General that future violations “may result in sanctions, which could include personal financial penalties, contempt of court findings, or relief specific to the prosecution of this matter,” and to confirm that the message was passed on. A declaration from the Acting U.S. Attorney follows on October 8.
ECF No. 53; response and declaration at ECF No. 56
Oct 11, 2025
The motion that decides whether this is a death penalty case, and it is almost entirely technical. Counts Three and Four both require a predicate offense that is a crime of violence. The only predicate alleged is the federal stalking charged in Counts One and Two. The defense says stalking does not qualify.
ECF No. 59
Dec 1, 2025
Days of testimony in Part 32 about the Altoona arrest. Partway through, the People withdraw his interrogation statements altogether, over a problem with Pennsylvania’s law on recording.
Thirty days in January
The federal case stops being capital, the two courts split on the backpack, and the District Attorney starts trying to get to a jury first. Everything after this follows from this month.
Jan 9, 2026
Oral argument on Counts Three and Four. The court also sets out the shape it has in mind for jury selection, with trial dates that depend on whether the case is still capital when it gets there.
Jan 28, 2026
Bragg’s office writes to Carro, J. asking for a state trial on July 1, 2026 — ahead of the federal case. New York has primary jurisdiction, having arrested him first, and the letter is the first open move in a fight about sequence that runs for the next six months.
Jan 23, 2026
Garnett, J. orders the government to produce an Altoona police officer who can speak to the Department’s December 2024 procedures for securing and inventorying the property of someone arrested in a public place — adding that the witness “need not have had any personal involvement in the Defendant’s arrest,” because the question is about the procedure and not about him.
ECF Nos. 90, 91
Jan 30, 2026
The first denies suppression of the backpack and everything in it. The second dismisses Counts Three and Four. Between them they take the death penalty off the table and leave the evidence in — and the reasoning in the second one is the reason the state case is now in trouble.
On the backpack: suppression is denied on three independent grounds — the loaded magazine found in a pre-transport safety search, the rest recovered in an inventory search at the station, and in any event the inevitable discovery of all of it under the federal search warrant, “even excising references to any items found or seen after the magazine, firearm, and/or silencer were found.”
On Counts Three and Four, the court is unusually direct about what it is being made to do. “The Court would be remiss not to note at the outset the apparent absurdity of the inquiry.” The defendant is charged with selecting a stranger to kill based on his employment, planning it, traveling across states to do it, and shooting him on a public street with a silenced handgun: “No one could seriously question that this is violent criminal conduct.” But the categorical approach forbids looking at the conduct, and asks instead about “the hypothetically least serious conduct that the charged crime could possibly cover.”
Run that way, federal stalking fails twice over: the only element that could supply force can be committed recklessly, which is not enough, and the statute can be satisfied by a threat of self-harm, which is not force “against the person of another” at all. So stalking is not a crime of violence, so it cannot be the predicate, so Counts Three and Four go — and with them the only capital exposure anywhere in the case.
“The analysis contained in the balance of this Opinion may strike the average person — and indeed many lawyers and judges — as tortured and strange, and the result may seem contrary to our intuitions about the criminal law. But it represents the Court’s committed effort to faithfully apply the dictates of the Supreme Court to the charges in this case. The law must be the Court’s only concern.”
ECF Nos. 102 (backpack), 103 (Counts Three and Four)
Feb 6, 2026
The defense files the federal scheduling order in state court, showing Carro, J. that federal jury selection is set for September 8. He responds by moving the state trial forward, from a date in the fall to June 8, 2026.
The defense then reports all of this back to the federal court, with an edge to it: the federal schedule had been set in open court and “extensively reported in the media,” and yet “the District Attorney’s Office did not write to Justice Carro or this Court at the time to address the state prosecutors’ concerns with a 2026 federal trial date. Given the above, the defense has been preparing for a federal trial.”
ECF No. 108 and Ex. A
Feb 2026
Being escorted out of a New York courtroom, Mangione is heard objecting to the prospect of back-to-back trials: “It’s the same trial twice. One plus one is two. Double jeopardy by any common sense.” His counsel says double jeopardy is being used as a weapon against him.
It is not a filing and it decides nothing, and it is on this page for one reason: it is an accurate statement of the constitutional position and an accurate statement of why that position loses. Under dual sovereignty, two prosecutions by two sovereigns are not the same offense, however much they look like the same trial. What saves the argument is not the Constitution but a New York statute, and the statute needs a conviction before it does anything.
Feb 27, 2026
Having been given a month to decide whether to take an interlocutory appeal of the dismissal, the government writes to say it will not. The federal case ceases to be capital for good. Learned counsel is relieved in April, with the court’s thanks.
ECF Nos. 113, 114, 129
The race to go first, and who won it
Both trial dates move four times between them. In June the federal court yields and the state case gets what the District Attorney had asked for.
Apr 1, 2026
The state trial is adjourned from June 8 to September 8, 2026. Hours later the federal court reshuffles its own schedule around that: in-person voir dire on October 13, openings on November 4, with January 2027 dates held in reserve “should a further adjournment of the trial become necessary.”
ECF No. 124
May 18, 2026
The firearm and the red notebook are admissible, recovered under the Altoona Department’s own protocol. But what came out of the first search, at the counter in the McDonald’s, is suppressed — a loaded magazine, a passport, a wallet, a phone, a computer chip — because officers went into the bag without a warrant when he was already detained and surrounded. Pre-Miranda statements go too.
So the two courts look at one backpack and give two answers. Garnett, J. denied suppression outright on January 30; Carro, J. grants it in part on May 18. Neither is obviously wrong — they are applying different records, and the federal ruling leans on a federal warrant the state case does not have — and nothing turns on the disagreement now that the federal case is over. It is here because it is the cleanest illustration of what running one killing through two systems actually produces: not a double punishment, but two different sets of facts.
What survives in state court is also what matters most. Whatever the notebook is taken to show, it is in.
Decision and order, May 18, 2026, Part 32
Jun 29, 2026
Garnett, J. adjourns the federal trial to January 25, 2027, with voir dire from January 5. The state case will go first, on September 8, by a clear four months. This is the posture that makes everything in August possible.
It is worth stopping on this, because it is where the case turns and it does not look like it at the time. The District Attorney spent five months arguing for the right to try him first, and won. The consequence of winning is that on June 29 the federal case becomes the one that is not about to happen — and therefore the one that can be ended unilaterally, by a defendant, at a moment of his choosing, without anybody’s agreement. Six weeks later that is exactly what happens.
Four days in August
He pleads guilty in the case that was five months away, and the case that was three weeks away stops.
Aug 14, 2026
An open plea to Counts One and Two: guilty to both federal stalking counts, with no plea agreement, no charges dropped, and nothing conceded by the government in return. Maximum exposure, life. He tells the court he knew what he was doing was illegal. Sentencing is set for December 18, 2026, a presentence report ordered, detention continued.
The timing is the whole of it. This is three and a half weeks before the state murder trial and five months before his own federal trial. He pleaded guilty, without consideration, in the case that was not about to start, and in doing so admitted on the record to the killing that the case about to start was going to be about.
An open plea is normally a bad trade: the defendant surrenders the trial and receives nothing for it. It stops looking like a bad trade if what he is buying is not leniency but a conviction — because a conviction is the one thing New York’s double jeopardy statute needs before it can bar anything. That reading is an inference, not something either side has said on the record, and it is marked as an inference here.
Change of plea, Aug 14, 2026; minute entry and oral order
Aug 14, 2026
Filed the same day in Part 32: dismiss counts three through ten — the murder count and every weapons count — under New York’s double jeopardy statute and on due process grounds, together with a renewed suppression application.
Counts three through ten, and not count eleven. The forged license is pleaded as November 24, 2024, and belongs to a different criminal transaction from the one the federal case covered, so there is nothing for the statute to bar. If the motion succeeds completely, what is left of this indictment is one count of carrying a fake New Jersey driver’s license.
Karen Friedman Agnifilo, for the defense: “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.”
Motion to dismiss, Aug 14, 2026, Part 32
Aug 17, 2026
Carro, J.’s order is three sentences long and never uses the word adjourned: the People respond by October 9, 2026, the defense may reply by October 30, and “the next adjourn date will be December 10, 2026.” The trial set for September 8 cannot go ahead while the motion is undecided, and so it simply does not.
A spokesperson for the District Attorney’s office says it will litigate the defense motions, and that the office “remains committed to seeking justice for Mr. Thompson and his family.” That is a position, not an argument, and the argument was not due until October 9. It was filed on that date.
Order, Aug 17, 2026, Part 32
Aug 28, 2026
The federal court unseals the transcripts of its June and August conferences, with redactions, weighing “the presumption of public access to judicial documents against the countervailing privacy interests.” It is the last entry on the federal docket.
ECF No. 145, citing Lugosch v. Pyramid Co. of Onondaga, 435 F.3d 110 (2d Cir. 2006)
Oct 9, 2026
Forty-nine pages, filed for the District Attorney by Joel Seidemann. The weapons counts survive because the federal gun counts were dismissed before the plea. The murder count survives because stalking and murder are “designed to prevent very different kinds of harm or evil.”
On the guns: in New York a case counts as an earlier prosecution of a charge only if it ends in a plea or a trial while that charge is still in it. “A mere charge is thus not enough to trigger double jeopardy,” and the federal firearm counts were gone by the time he pleaded.
On murder, the brief turns the defense’s own federal win against it. In January the defense persuaded Garnett, J. that stalking is not a crime of violence, because a stalker need not intend or even foresee a death. The People say that is exactly why stalking aims at a different evil from murder: “The reasoning of that decision directly supports a finding that the requirements of CPL 40.20(2)(b) are satisfied here.”
The due process claim is “nothing more than a masked double-jeopardy argument.” And the state-only defense the motion says he lost, extreme emotional disturbance, was in their view “doomed to fail” anyway: “The evidence in this case incontrovertibly establishes that this was a long-premeditated and well-choreographed killing.”
People’s memorandum in opposition, Oct 9, 2026, at 1–3, 12, 21–23, 37
Oct 30, 2026
Stalking a man with intent to kill him, and then killing him, is the same “core misconduct” as murder. And a gun count dropped from an indictment he pleaded to was still prosecuted.
“One of the harms clearly addressed by the expansive federal stalking statute is stalking with the intent to kill and resulting in the killing of the person stalked,” Karen Friedman Agnifilo, Marc Agnifilo and Jacob Kaplan wrote. “It is a statute that, like a state murder statute, is intended to keep people safe from being murdered — the oldest crime there is.” The extra federal elements, crossing state lines and using electronics, “are not the evils or harms being prevented.”
On the guns: “when Mangione pleaded guilty to the federal indictment, the criminal action in which he had been charged with possession and use of the firearm was terminated for statutory double jeopardy purposes.” It then takes the People’s cases one by one: “Every case allowing successive prosecution involved conduct that was different between the two prosecutions.” On due process it adds nothing, relying on the motion. The clerk stamped it received on November 2.
Nov 8, 2026 · the record ends
Both sides have now filed. The argument that New York may try him anyway is on the record in the People’s own words, and the reply in the defense’s. The question is Carro, J.’s to decide.
Read as a whole, the case is a sequence of wins that each cost the winner something. The defense beat the terrorism counts, and in doing so reduced the state case to the one New York could most easily retry. It beat the capital counts, and in doing so established that the federal case is about stalking rather than violence — which is the premise the People now need. The District Attorney won the right to go first, and in doing so left the federal case idle and available to be closed by the defendant alone. None of those were mistakes. They were just moves in two games at once, scored in one.
Notes
The federal case is built from its own docket, No. 1:25‑cr‑00176 (MMG), read in full through the archive of PACER filings. Every federal citation on this page is an ECF No. and can be pulled from that docket. The two January opinions are quoted from the filed text.
The state indictment is quoted from the signed copy published by the District Attorney’s office, and the August 17 scheduling order from the copy filed in Part 32 — both in full, both short. The People’s October 9 response is quoted from the copy Courthouse News published.
The two state decisions that matter most — the September 2025 omnibus decision and the May 2026 suppression decision — are summarized here from contemporaneous reporting of them, with one quoted passage from the first. That is a weaker chain than the rest of the page and is marked as such below.
The People answered the double jeopardy motion on October 9, 2026, and the defense replied at the end of the month. The Side by Side View sets the two side by side, each quoted from its own papers. The defense reply is quoted from the court-stamped copy LA Magazine published.
New York County Supreme Court has no public docket of the kind PACER provides, so the state record here is not a complete list of filings in the way the federal one is. Where a state filing is described, it is because a copy or a reliable account of it is public — not because the docket was read end to end. Assume the state side is less complete than the federal side, because it is.
The Pennsylvania case is noted once and then dropped. It has never been tried and nothing in it bears on the question this page is about.
Brian Thompson was fifty, and had a wife and two sons. The case is interesting for reasons of statutory construction, and a page organized around statutory construction can quietly turn a killing into a puzzle. He is named here every time the record names him, and the one thing nobody in any of these courtrooms has disputed since August 14, 2026, is how he died.
One reading on this page is an inference rather than a fact: that the open plea was entered to trigger the state double jeopardy bar. Neither side has said so on the record. It is marked as an inference where it appears, and it is the only place this page reasons about motive.
Not legal advice, not a finding, and not a verdict. He has been convicted of two federal stalking offenses by his own plea and has not been tried for murder by anybody. The state counts are allegations and remain allegations, and the question of whether they can be tried at all is undecided by the only person who gets to decide it. Where the record does not reach, this page says so and stops.
If something here is missed, misrepresented or unfairly portrayed, let me know. Point me at a filing or record and I will verify it on my end. I actively look to correct, improve and remain unbiased.
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Record reviewed through November 8, 2026. Both cases are live: the federal one awaits sentence on December 18, and the state one awaits a decision on a motion both sides have now briefed. This page will be wrong in some particular within weeks, which is the condition of writing about a case while it is still happening.
Plain English
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