The murder trial of Lindsay Clancy, a Massachusetts nurse accused of killing her three young children in January 2023 while suffering severe post-partum depression, has begun and is being described as one of the most harrowing cases to reach an American courtroom. The proceedings have drawn intense public attention both for the shocking nature of the crime and for the unusual dynamic of Clancy's ex-husband, Patrick, publicly supporting her despite losing their children.

Patrick Clancy is set to testify as the trial's first witness, having previously spoken out in defence of his ex-wife and attributed her actions to a severe mental health crisis rather than malice. The case is expected to focus heavily on questions of Clancy's mental state at the time of the killings, with post-partum depression central to her defence, as the court examines the circumstances that led to the deaths of the couple's three children.