Months before Lindsay Clancy strangled her three children, she lost significant weight, couldn't sleep and complained of postpregnancy mental health issues, the family's former nanny testifi

Months before Lindsay Clancy strangled her three children, the family's former nanny said she saw her deal with significant weight loss, insomnia, and postpregnancy mental health issues.

A Massachusetts woman has gone on trial in a case in which her lawyers are expected to argue that postpartum issues were the reason she killed her three children.