The Moore house seemed awfully quiet one June morning in 1912, prompting neighbors to investigate. Inside, they discovered a horrific scene: All eight people who'd been inside -- a mother, father, their four children and two young guests -- had been brutally slain in their sleep.
The case that followed would be one of the highest-profile, longest-lasting mysteries in the history of the Midwest -- a mystery that a pair of authors think they've finally solved.