Eileen and Keen Umbehr's obsession with the prosecution of Dana Chandler led them to spend more than 15 years trying to prove her innocence — an all-consuming odyssey that’s the subject of a new, three-part HBO docuseries

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

Eileen and Keen Umbehr spent decades seeking a different verdict to the answer of who killed Karen Harkness and Mike Sisco in Kansas, 2002.