When a young girl was found dead in her back yard, her parents told police that she was attacked and killed by the family dogs. Investigators did not agree and believed that the girls wounds were not dog bites at all, but a slashing injury, consistent with a knife wound. The parents were found guilty of murder and sentenced to life in prison. Five years later, the parents prayers were answered when a forensic scientist saw something in the crime scene photographs that had been missed the first time around. Watch Forensic Files to get the answer.