it s very hard. a heartbreaking test of faith and love. i want to know that his life is a gift. inconceivable. also tonight. shots fired at very close range. a young bride murdered. a robber or a rival? they thought i was the killer. i mean, come on. for two decades this once red hot case grew ice cold, until a new look at an old lead led to a most unexpected place. we care about justice more than we care about each other sometimes. end of story? now you re accusing me of this? or just the beginning. she s being set up. internal affairs. good evening and welcome to dateline. i m ann curry. what does it mean to be a mother and where does a child s identity come from? those are the questions that face two families at the center of our story tonight. it begins with a mother longing for another child. soon she would have a choice to make, and it would be her hardest test, and her greatest gift. here s meredith vieira. i think you don t real