WATCH LIVE: Ex-husband of Lindsay Clancy takes stand in her murder trial after opening statements. [UWl65mWnwTy]

Opening statements are set to begin Monday in the Lindsay Clancy murder trial, where jurors will hear competing arguments from prosecutors who say the Duxbury mother intentionally killed her three children and defense attorneys who contend she was suffering from postpartum psychosis and was not criminally responsible for her actions. Read more: Follow Boston 25 News on: YouTube: Facebook -- X -- Instagram -- TikTok -- Download the Boston 25 News app: