we will never know what l cassidy saw and what she didn t see. n maybe she couldn t tell detectives who the killer was, but maybe she didn t have to. the fact that cassidy was spared, would that mean anything to a jury. , the person that killed the mother cared about cassidy. hello, welcome to dateline. michelle young was married to her college sweetheart, four months pregnant with her second child when the unthinkable happened. the young mother beaten to death in her own bathroom. troubled marriage. but husband was away on businesn and unraveling this complicated case would take years. here s keith morrison with silent witness. i think i paused for a second and had to take a deep breath