When a woman disappears, her abusive ex-boyfriend becomes a suspect. But a set of keys point in another direction.
On the day after the 9/11 terrorist attacks, a New York woman went missing. Several men, including her estranged husband, were suspected, but the case went unsolved until a slip of the tongue led to an arrest.
When a real estate developer is shot to death, circumstantial evidence points to his wife. But investigators identify the gun after discovering a non-fatal bullet that was fired nearly two decades earlier.