A novelist's wife is found dead at the bottom of the stairs. Investigators wonder if it was an accident or murder. Dennis Murphy interviewed main suspect Michael Peterson and now returns to the case with insight only he can share.

For more than 30 years, Ohio investigators have searched for answers in the murder of 10-year-old Amy Mihaljevic. The details of the case still haunt Josh Mankiewicz. Now he and investigators are enlisting your help to solve it.