1x2 - 911: Did the Killer Call?

A woman, and her 13-year-old son, call 911 to report a break-in and gunshots, stating that her husband may be dead. A woman falls to her death in the Rockies, her husband calls 911. The police must find out whether her death was really an accident or was she pushed. And a three-year-old is found dead in a river. Her father calls 911; he becomes the prime suspect.