Lindsay Clancy's defense team filed a motion to dismiss her three first-degree murder charges on double jeopardy grounds, arguing the judge declared a mistrial without properly investigating the lone holdout juror who blocked an acquittal.
Attorney Martin Weinberg filed the motion Monday in Plymouth, Massachusetts, raising claims under the Fifth, Sixth, and Fourteenth Amendments. Clancy faces three counts of first-degree murder for the strangling deaths of her three children, Cora, 5, Dawson, 3, and Callan, 8 months, at the family's Duxbury, Massachusetts, home in January 2023. Her seven-week trial ended in a mistrial on Sept. 4 after the jury deadlocked 11 to 1, with eleven jurors favoring a finding that Clancy was not criminally responsible and a single holdout insisting on guilt.
The double jeopardy motion strikes at a narrow but consequential question: did Judge William Sullivan have legal justification, what courts call "manifest necessity", to declare the mistrial in the first place? Weinberg's filing argues he did not, because the judge never adequately investigated whether the holdout was refusing to follow the court's own instructions on reasonable doubt.
The defense motion lays out a sequence that, if accurate, raises serious questions about how Sullivan handled the deadlock. Weinberg wrote that the jury twice told the court one of its members was refusing to apply instructions on reasonable doubt. After the first report, Sullivan questioned each juror individually about whether they could follow the law. After the second report, he took a lighter approach, simply reminding the full panel of their general obligation to follow instructions.
Weinberg's filing states that Sullivan denied Clancy's "explicit requests to go further." The defense had moved to dismiss the holdout and replace him with an alternate. Sullivan overruled that motion. Then he declared a mistrial.
In the filing, Weinberg argued:
"Ms. Clancy, like all criminal defendants, had a Constitutional right to have her fate decided by an impartial jury of her peers, faithfully applying the law as instructed rather than superimposing the juror's own view of legal right and wrong, including the foundational principle that, absent proof beyond a reasonable doubt of her guilt, she must be acquitted."
The motion contends that the "multiple reports of a juror violating this bedrock principle" demanded a judicial inquiry into whether Clancy's right to an impartial jury was being violated, an inquiry that never came. Without that investigation, Weinberg argues, the court lacked the legal basis to end the trial and expose Clancy to a second prosecution.
The trial itself ended abruptly after weeks of testimony in which prosecutors argued Clancy acted deliberately and understood that strangling her children with exercise bands was wrong. The defense countered that she suffered from postpartum psychosis.
Separately, Clancy's trial attorney Kevin Reddington filed a motion on Friday seeking a far-reaching investigation into the holdout juror, referred to in court filings as "Juror Doe" under an impoundment order protecting jurors' identities. The holdout has since been publicly identified as Michael P. Desronvil, who has retained his own attorney.
Reddington's motion asks the court to preserve records from all 12 panelists and six alternates, including juror questionnaires, courthouse hallway surveillance video from outside the deliberation room, and sign-in sheets for jurors' cellphones. But the sharpest requests target the holdout specifically.
The motion seeks Desronvil's phone records between 8:30 a.m. and 4:30 p.m. on each day of deliberations, along with an independent examination of his phone use during that period. Reddington also wants the holdout's probation records and his "record from the statewide domestic violence registry." The filing asks the court to require prosecutors to disclose whether they had any contact with Desronvil, as a defendant, complainant, or subject, going back to January 2021.
Reddington further seeks information about any background checks stemming from a February motion Plymouth County prosecutors filed for access to prospective juror information. And he wants the holdout questioned about the truthfulness of his juror questionnaire and his answers during jury selection, his statements to the court on Sept. 3, and whether he used a phone or accessed outside information during deliberations.
One line in the filing references another juror: "The court may also hear from Juror No. 10 limited to what he observed of Juror Doe's phone use." That detail suggests the defense believes at least one fellow juror witnessed something worth investigating.
After the mistrial, Desronvil broke his silence publicly, though the fallout from his holdout vote has been intense. Reddington told reporters outside the courthouse that the other eleven jurors felt cheated by the outcome.
Reddington said:
"[The other jurors] know that they were robbed, by one man, for whatever his agenda was, who stole seven weeks of the life of these other jurors that were so attentive, so beautiful, so wonderful and listened to this evidence."
Weinberg is no stranger to this legal strategy. He previously represented Karen Read in a double jeopardy claim after her own high-profile Massachusetts trial. That motion failed, though Read was later acquitted of all homicide-related charges in her second trial.
Legal experts have noted that such motions rarely succeed. Clancy's defense has also filed a separate, routine motion asking the court to overrule the holdout and declare her not guilty outright, a request that experts say almost never prevails.
Plymouth County prosecutors have not yet officially announced whether they will seek a new trial. The judge has not publicly responded to either the double jeopardy motion or the request for an inquiry into the holdout.
The aftermath of the mistrial has extended well beyond the courtroom. Desronvil's attorney has said the holdout faced death threats, and the case has drawn attention from national political figures. President Trump called the case "a horrible tragedy," while Florida Governor Ron DeSantis made headlines by offering the holdout juror refuge in Florida after a local NBC affiliate investigated his background.
Taken together, the two motions form a coordinated legal strategy. The double jeopardy motion argues the mistrial itself was improper and that retrying Clancy would violate her constitutional rights. The inquiry motion aims to build the factual record that could support that argument, or reveal misconduct that would make a retrial even harder for prosecutors to justify.
If the court grants the inquiry and finds that the holdout ignored the judge's instructions, accessed outside information, or misrepresented himself during jury selection, the defense's argument that the mistrial lacked "manifest necessity" grows stronger. Sullivan, the defense contends, should have investigated the holdout before pulling the plug on a trial that eleven jurors were prepared to resolve.
Whether or not these motions succeed, they put the court and prosecutors in an uncomfortable position. The defense is not just asking for a second chance. It is arguing that the system failed Lindsay Clancy the first time, and that forcing her through it again would compound the failure.
Three children are dead. Eleven jurors heard seven weeks of evidence and reached a conclusion. One juror blocked it. The question now is whether the court will examine why, or simply start the whole process over and hope for a different number.
