The persistent, decades-long investigation by citizen sleuths Eileen and Keen Umbehr into the 2002 double homicide of Karen Harkness and her boyfriend Mike Sisco is the subject of the documentary "A Killer Story." The film delves into the couple's quest for a different verdict regarding the murders that occurred in Topeka, Kansas.
Authorities had concluded that Dana Chandler, Sisco's ex-wife, was responsible for the killings. Chandler was subsequently arrested, tried, and convicted of first-degree murder in the case. However, the Umbehrs, who have dedicated years to investigating the crime, sought to challenge the established narrative.
In 2017, Eileen Umbehr, a stay-at-home mother from Alma, Kansas, reached out to veteran investigative journalist Joe Sexton. Sexton, who has worked with The New York Times and ProPublica, was initially informed about the case by Umbehr. Despite the official conclusion of guilt, the Umbehrs' efforts highlight a persistent pursuit of truth beyond the courtroom verdict. The documentary explores the complexities of the case and the dedication of those who refused to accept the initial findings.