The question the market actually asks
Will Lindsay Clancy be convicted of murder? Our current trial model places the odds around 42.5%. That is a year-end number, not a snapshot of what the next jury note will say.
Polymarket’s contract is narrower than the public debate around the case. It resolves Yes if Clancy is convicted of at least one murder charge in the ongoing Commonwealth v. Lindsay Clancy case by December 31, 2026, 11:59 p.m. ET, or, if there is a mistrial, by the end of any retrial that begins before that date. Otherwise it resolves No.
A straight not-guilty verdict, a finding of not criminally responsible because of mental illness, a dismissal, or a plea that does not produce a murder conviction all pay No. Appeals after the first judgment do not reopen the market. First-degree and second-degree murder both count. Manslaughter does not.
What the jury is deciding
Lindsay Clancy, a former labor-and-delivery nurse, is on trial in Plymouth Superior Court for the January 24, 2023 strangling of her children Cora, 5, Dawson, 3, and Callan, 8 months.
After sending her husband out for takeout, she committed the act and then jumped from a window. She is now paralyzed. She does not deny the killings.
The fight is whether Massachusetts can prove she was criminally responsible, or whether postpartum psychosis and a chaotic medication regimen leave her not guilty by reason of lack of criminal responsibility.
Five options, three counts
A jury of nine women and three men heard five weeks of evidence, closings on August 27, and was still deliberating on day two with five options per child:
- first-degree murder
- second-degree murder
- manslaughter
- not guilty
- not criminally responsible (NCR)
As of Friday, August 28, the panel had not returned a verdict and was sent home for the weekend. Deliberations were set to resume Monday, August 31. There is no scheduled verdict time; the result is whenever the twelve people agree.
For traders, mixed outcomes across the three children still resolve Yes if any count is murder. Three manslaughter findings, three NCR findings, or a mix of those with no murder count all resolve No.
How we get to 42.5%
We built a model that takes data from historic postpartum-filicide NGRI rates, this jury’s gender split, planning evidence, and the fact they have already sat hours without a snap verdict.
Our model gives a 42.5% chance of a murder conviction on at least one count by year’s end. That includes a timely retrial if this panel hangs.
Historic maternal-filicide cases with a developed postpartum-psychosis record often land on NCR or a lesser homicide offense, which is why the modal outcome in our model is still No. The 42.5% is not a claim that murder is the most likely single verdict. It is the combined probability of first- or second-degree murder on any count, plus the residual chance that a mistrial is retried and produces a murder conviction before the contract dies at year-end.
Two inputs pull that number up. Planning evidence (the takeout errand, the sequence in the house) is the prosecution’s best path to criminal responsibility. A jury that has already sat through hours of deliberation without a snap NCR verdict is also less likely to be a 90-minute “not responsible” panel. Neither input makes murder the favorite.
What would reprice the model fastest
A verdict of first- or second-degree murder on any child ends the market at Yes. NCR on all murder counts, or manslaughter without a murder conviction, ends it at No. A hung jury is the messy middle: the market stays open unless charges are dropped, and our 42.5% already bakes in a retrial that starts before December 31.
Jury notes about medications, the knife, or the legal definition of criminal responsibility are information, not resolution. They can move the book. They do not pay.