Lindsay Clancy 's murder trial zeroed in Friday on the nearly five days that the Massachusetts mother spent in a psychiatric hospital a few weeks before she killed her three children. Her stay is a key chapter in both the prosecution and defense narratives about her mental state when she strangled the children in their suburban home and then jumped out a second-story window. In questioning one of her McLean Hospital psychiatrists on Friday, a prosecutor underscored that Clancy denied to that a...