Eileen and Keen Umbehr were convinced the wrong person was convicted for double-homicide. After sending Pulitzer-winning journalist Joe Sexton 2,714 emails about it, he agreed to investigate – and it led to a messy entanglement

In HBO’s gripping new docuseries A Killer Story, a crusading couple become convinced that woman accused of murder is innocent

But that doesn't mean journalist Joe Sexton, director Matthew Galkin or producer Joshua Levine will pronounce her innocent in new HBO doc.