How America's deadliest serial killer went undetected for more than 40 years

Part I: The perfect victim. For more than 40 years, America’s deadliest serial killer went undetected. He claims to have killed at least 93 people, nearly all women, many of whom remain unidentified. He got away with it by preying on those on the margins of society whose murders police failed to solve. Wesley Lowery, Hannah Knowles and Mark Berman share their gripping investigation in The Washington Post. Tomorrow, join us for Part II where we find out how America's deadliest serial confessed to killing 93 people — now, police must find them. Just search "America's deadliest serial killer".