Judge William Sullivan declared a mistrial in the trial of Lindsay Clancy, an American woman charged with killing her three children. ^[1] Federal Judge William Sullivan announced on a Friday that he will declare the trial of Lindsay Clancy null and void in Plymouth, Massachusetts. ^[2] Judge William Sullivan stated on Friday that he would hold off on formally declaring a mistrial for one hour to allow the defense to file an emergency appeal. ^[3] A judge in Massachusetts declared the trial of Lindsay Clancy null and void after the jury failed to reach a unanimous verdict on her murder charges. ^[4] Lindsay Clancy, a 36-year-old former nurse, was accused of three counts of first-degree murder for allegedly strangling her three children in their family home in Massachusetts in 2023. ^[5] The jury in Lindsay Clancy's trial concluded their sixth day of deliberations on September 3, 2026, without reaching a verdict. ^[6] After the foreperson's message, Judge William Sullivan re-read the instructions on reasonable doubt to the jury and declined to remove the juror, a request made by defense attorney Kevin Reddington. ^[7] In the murder trial of Lindsay Clancy, who is accused of killing her three children in 2023, the jury entered its seventh day of deliberations on Friday, September 4, 2026, in Plymouth, Massachusetts. ^[8] The jury's foreperson told Judge William Sullivan on Thursday, September 3, 2026, that a single juror was not following the court's instructions about reasonable doubt. ^[9] Judge William Sullivan put his mistrial ruling on hold for one hour to allow Lindsay Clancy's defense lawyer to file an appeal with a higher court. ^[10] The jury in the Lindsay Clancy trial was deadlocked 11-1, with the majority apparently leaning towards finding Clancy not guilty by reason of insanity. ^[11] The jury sent a note to Judge William Sullivan on Friday indicating they were unable to reach a unanimous decision on whether Lindsay Clancy is criminally responsible for killing her children. ^[12]