Eleven-year old Shawn Hornbeck near his home in Richwoods, Missouri. Gone for over 4 years, his parents never give up hope. Suddenly, in January of 2007, another kidnapping eerily similar to Shawn's led police to a break in the case.

Todd Sommer, a 23-year-old Marine, died suddenly in 2002. Military authorities said it was murder - that he was poisoned with arsenic by his wife Cynthia. The defense claimed not only was Cynthia innocent, but in fact Todd wasn't poisoned at all.

Police called Mark Winger a hero on Aug. 29, 1995 when he seemingly tried to save his wife, Donnah, from being bludgeoned to death in their home. Years later, Donnah's best friend, revealed to police that she and Mark Winger had been having an affair.

A small child is the only witness to a terrible crime: the murder of her mother. But investigators say they can't rely on her testimony, because she is just a toddler.

Hundreds of Americans die every year from accidental carbon monoxide poisoning. But, according to police in Ohio, one of those deaths, wasn't an accident - it was murder.

The intruder came in the night...assaulting women in upscale neighborhoods. And for 14 years he took every precaution to make sure he would elude capture.