Married true-crime buffs embarked on an obsessive mission to prove a double murderer’s innocence. It got complicated

Key Points:

• Eileen and Keen Umbehr, a married couple from Kansas, have spent over 15 years advocating for Dana Chandler, who is serving two life sentences for the 2002 murders of her ex-husband Mike Sisco and his girlfriend Karen Harkness, despite Chandler's own children testifying against her.
• Chandler was convicted twice, with her first conviction overturned due to prosecutorial misconduct involving false claims about a protection order; however, her second trial in 2023 resulted in reconviction and the same sentence after a jury deliberated less than four hours.
• The case is controversial, with retired detective Richard Volle and multiple juries convinced of Chandler's guilt, while the Umbehrs and investigative journalist Joe Sexton highlight flaws and lack of direct evidence tying Chandler to the crime scene.
• Chandler's defense has been complicated by her firing of lawyers to represent herself during the most recent trial, and her inconsistent alibi for being out of state during the murders was heavily challenged in court.
• The story is the focus of a new HBO docuseries, "A Killer Story," which explores the legal battles, the Umbehrs' crusade, and the complex relationships involved, including the confrontation between Chandler and her daughter during the trial.