Today's topic is one of the deadliest women in American history - the serial killer Belle Gunness. We're tackling her background, backstory and everything in between in this dark episode. Was Belle responsible for her first two husbands' deaths? What really happened in the fire that destroyed her home? Can we piece together the clues to find out the truth that's buried in her basement? Join us for Part One of Belle Gunness, and don't worry, Part Two is coming next week.