The defense blamed one juror for the deadlock.
The murder trial of Lindsay Clancy, the Massachusetts mom who killed her three young children while in the family's home on Jan. 24, 2023, ended Friday in a mistrial after seven days of juror deadlock.
Clancy's defense attorney, Kevin Reddington, claimed throughout that trial that she was suffering from postpartum psychosis when she strangled her children and attempted to take her own life. The prosecutors, Jennifer Sprague and Shanan Buckingham, argued that Clancy -- who pleaded not guilty to three counts of first-degree murder -- is criminally responsible for her children's deaths.
Judge William Sullivan, who oversaw the trial, set a court date of Sept. 29, 2026, to reconvene and determine next steps.
See below how the final days of the trial unfolded.
Watch a special edition of "20/20," "The Trial of Lindsay Clancy," airing Friday, Sept. 4, at 9/8c on ABC, streaming the next day on Disney+ and Hulu.
Disney is the parent company of ABC News and Hulu.
Jurors have been sent home for the day after a second full day of deliberations.
The jury has been deliberating for about 16 hours total over a span of three days.
They are expected to continue deliberating on Tuesday.
Jury deliberations resumed Monday in the trial of Lindsay Clancy.
This is the second full day of deliberations and now beginning the eleventh hour of deliberations.
"Good morning, your honor," Clancy said when the judge greeted her.
Jurors filed in with no discernible expression.
