In response to the charges, Clancy “pleaded not guilty by lack of criminal responsibility, claiming that she was suffering from postpartum psychosis and overmedication.”
Prosecutors asserted that Clancy knew what she was doing on the night she killed her children. She sent her husband, Patrick, out of the house to run errands and to pick up dinner. While he was running errands, they spoke on the phone. When he returned, he found his three dead children, and his wife had attempted suicide.
Because of the story's tragic nature, the trial, held in a Plymouth, MA, courthouse, became a national sensation. Millions of Americans followed the trial live online. Opinions were split on whether Clancy was guilty or should be acquitted due to her mental illness.
Outside the courthouse, Clancy's female supporters wore pink to show solidarity. Inside the courthouse, two female jurors also wore pink, seemingly to show their support for her too.
During the trial, Clancy’s defense attorney, Kevin Reddington, blasted her doctors who prescribed her a variety of medications to treat her illness. He said she was not treated properly and blamed the killings on “the damn medicine and the lousy medical care that she got.”
After Reddington and the prosecutors presented their cases, questioned witnesses, and made their final arguments, the jury of nine women and three men began deliberations. Along with first-degree murder charges, the jury considered the lesser charges of second-degree murder and manslaughter.
On multiple occasions, the jurors informed Judge William Sullivan that they were deadlocked. He eventually issued them “an instruction known as Tuey-Rodriguez, which states that a verdict is ‘preferable’ before sending them back to deliberate further.” Several days later, it became clear they could not reach a consensus, and Judge Sullivan declared a mistrial.