Prosecutors say she opened Apple Maps to time exactly how long she had before her husband got home.
Then she killed her three children, one at a time, with exercise bands.
Seven days later, a jury handpicked in one of the bluest counties in Massachusetts couldn't agree she should answer for it.
A Deval Patrick Judge Presides Over the Collapse
Judge William Sullivan declared a mistrial Friday after the jury – nine women and three men – told him for a third time they were deadlocked.
Sullivan isn't some random name pulled from a docket.
Former Massachusetts Governor Deval Patrick put him on the Superior Court bench in 2014.
Before that, Sullivan spent decades as a criminal defense attorney representing the accused.
So when Lindsay Clancy's lawyer needed a judge sympathetic to an insanity defense built on stacks of psychiatric testimony, Plymouth County delivered exactly that kind of courtroom.
Sullivan even gave jurors what's called a "dynamite charge" – a judicial nudge urging them to reconsider their positions and reach a verdict.
They still couldn't do it.
What Prosecutors Actually Proved
Prosecutors told this jury Clancy acted "intentionally, rationally, and swiftly."
They said she used a mapping app to calculate travel time before deciding how long she had to kill her children.
She sent her husband, Patrick, out on an errand.
She went to her 5-year-old daughter, Cora, first.
She went to her 3-year-old son, Dawson.
She went to her 8-month-old son, Callan, last.
Defense attorney Kevin Reddington built his entire case around postpartum psychosis, arguing Clancy had been prescribed up to a dozen psychiatric medications and was too disconnected from reality to know right from wrong.
Prosecution medical experts testified she was depressed, not psychotic.
Reddington attacked those experts on the stand, accusing them of using an outdated four-week definition of the postpartum period and telling the courtroom, "You have these men coming in here that don't even know psychosis from schizophrenia."
Eleven Jurors Saw It. One Didn't.
By all accounts, eleven of the twelve jurors were prepared to hold Clancy accountable.
One juror – reportedly the lone man among three on the panel – refused to move, and the defense accused him of ignoring the judge's instructions on reasonable doubt.
Reddington asked Sullivan to remove that juror and restart deliberations with a replacement.
Sullivan said no.
Reddington then filed an emergency appeal with the Massachusetts Supreme Judicial Court, the state's highest court, asking it to override a sitting judge in the middle of jury deliberations.
The high court rejected it too.
Only after that did Sullivan formally end the trial.
The Insanity Defense Loophole Nobody Wants to Talk About
Here's the number the defense bar doesn't advertise.
The insanity defense succeeds in less than one-tenth of one percent of criminal trials nationwide, according to research published in the Journal of the American Academy of Psychiatry and the Law.
But in cases where a mother kills her own infant, that success rate jumps to somewhere between 15 and 27 percent, depending on the study.
The more horrifying the crime against a child, the more often a jury reaches for a psychiatric explanation instead of a guilty verdict.
That's not compassion.
That's a loophole with a body count.
The defense is already signaling it will fight to keep Clancy from ever facing a second jury, arguing that errors during this trial give her strong grounds to block a retrial on double jeopardy grounds.
Now It's Up to an Elected DA
Plymouth District Attorney Tim Cruz says he hasn't decided whether to put Clancy in front of another jury.
That decision will tell you everything about whether Massachusetts still believes in consequences.
Cora, Dawson, and Callan Clancy aren't getting a second chance.
Their mother might.
Sources:
- "Massachusetts mom offers to admit killing 3 children as prosecutors push back on move that could dodge prison," Fox News.
- "Who is William Sullivan? Lindsay Clancy Trial Judge in Spotlight," Newsweek, September 2026.
- "William F. Sullivan," Ballotpedia biographical entry.
- "Factbox: Lindsay Clancy trial the latest high-profile murder case for Judge William Sullivan," Reuters, September 4, 2026.
- Nau, et al., "Postpartum Psychosis and the Courts," Journal of the American Academy of Psychiatry and the Law, Vol. 40, No. 3.
