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Lindsay Clancy's ex-husband, Patrick, is expected to testify on the first day of her murder trial today over the tragic deaths of their three young children.

He will take the stand for the prosecution as jurors hear the harrowing 911 call he made to police the night he discovered their children's bodies.

Clancy, who has pleaded not guilty, is on trial for strangling their kids – five-year-old Cora, three-year-old Dawson and eight-month-old Callan – using exercise bands while her ex-husband collected takeout food in January 2023.

The defense will argue that Clancy, a former labor and delivery nurse, is not criminally responsible for the killings as she suffered an acute episode of postpartum depression and psychosis at the time of their deaths.

The Massachusetts mother had been prescribed thirteen different psychiatric medications in the months leading up to the tragedy.

Prosecutors argue the killings were deliberate and premeditated.

After the murders, Clancy allegedly attempted to take her own life by cutting her wrists and neck before jumping from the second-floor window of the family's Duxbury home.

Clancy survived but was left paralyzed from the waist down and now uses a wheelchair.

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