India, Aug. 13 -- Lindsay Clancy's ex-husband's role in the case has become a central point amid her trial. Patrick Clancy took the stand on the first two days of the trial and testified about finding his kids fatally injured and Lindsay's struggles with mental health. He is recognized as a grieving father and a key prosecution witness.

During his testimony, Patrick recalled how he returned from running errands to his family's Duxbury, Massachusetts, home, and found his three children lying motionless in the basement, each with an exercise resistance band around their neck.

The Massachusetts mother is facing three counts of murder in the killings of her children Cora, 5; Dawson, 3; and Callan, 8 months. The proceedings are taking place ...