A trial is underway in Massachusetts for a woman accused of killing her three young children. The woman's ex-husband is a key witness in the case and is expected to continue his testimony. He has already begun describing the events of the day in question, which started out normally with activities like art projects and playing in the snow.

However, the day took a tragic turn when he arrived home to find the bodies of their children. Further details about the case and the trial are available from the source, including the prosecution's statements and the ex-husband's ongoing testimony.