With HBO’s three-part docuseries A Killer Story already two episodes in and the finale set for Sept. 24, the Dana Chandler case is drawing a new wave of searches from viewers trying to separate the series’ reporting from decades of rumor. Per HBO’s announcement, as carried by The Futon Critic, the series debuted Thursday, Sept. 10, at 9:00 p.m. ET/PT on HBO and streams on Max, with new episodes on subsequent Thursdays.
At the center of the case is Dana Chandler, convicted in connection with the July 7, 2002, killings of her ex-husband, Mike Sisco, and his fiancée, Karen Harkness, in Topeka, Kansas. Chandler has maintained her innocence. The series follows journalist Joe Sexton as citizen investigators Eileen and Keen Umbehr pull him into a fight over whether Kansas convicted the right person.
TL;DR
- A Killer Story is a three-part HBO Documentary Films series from director Matthew Galkin and Story Syndicate. It premiered Sept. 10, 2026, on HBO and Max; episode two aired Sept. 17; the finale is scheduled for Sept. 24.
- On July 7, 2002, Mike Sisco and Karen Harkness were found shot to death in bed in Harkness’s Topeka home, according to local court coverage of the case.
- Chandler was first convicted in 2012; the Kansas Supreme Court later overturned that conviction over prosecutorial misconduct. A 2022 retrial ended in a hung jury. A third trial in 2025 ended in guilty verdicts and consecutive life sentences.
- The series is built around Sexton’s reporting after years of contact from the Umbehrs, who argue Chandler was wrongfully convicted.
- Much of the case evidence discussed in press coverage was already public through trials, appeals, and earlier true-crime TV. The series’ present-tense hook is how those materials, and the people obsessed with them, shaped the legal fight.
What Is A Killer Story and Where Can You Watch It?
According to HBO’s series announcement, A Killer Story is a three-part documentary examining a polarizing murder case that stretched more than two decades. It debuted Thursday, Sept. 10 (9:00-9:40 p.m. ET/PT) on HBO and is available to stream on Max. New episodes debut subsequent Thursdays at the same time.
HBO credits director Matthew Galkin (One Night in Idaho: The College Murders) and lists Story Syndicate as the production company, with executive producers including Liz Garbus, Dan Cogan, and Jon Bardin. Investigative journalist Joe Sexton (The New York Times, ProPublica) appears as both a participant and a narrative guide.
Episode titles in the announcement are “Welcome to Topeka” (Sept. 10), “Person of Interest” (Sept. 17), and “A Dangerous Notion” (Sept. 24). The finale synopsis says Chandler dismisses her legal team and represents herself in a third trial, and that the legal verdict brings finality without necessarily settling the truth.
The series sits among other true crime cases with major 2026 updates that keep drawing search traffic when a new documentary reframes an older file.
What Happened on July 7, 2002?
Mike Sisco and Karen Harkness were found shot to death in bed inside Harkness’s Topeka home on July 7, 2002. Local reporting on the later trials, including WIBW’s coverage of Chandler’s third-trial verdict, describes the victims that way and places the crime in a southwest Topeka residence.
Investigators treated the killings as targeted rather than random. Attention quickly focused on Sisco’s ex-wife, Dana Chandler, who had moved to Colorado after a contentious divorce. Chandler told authorities she was in Colorado at the time and denied involvement. For years the case produced no arrest.
How Did Dana Chandler End Up on Trial Three Times?
Chandler was arrested years after the murders and convicted in 2012 of two counts of first-degree murder. Rolling Stone’s September 2026 feature on the HBO series summarizes that first trial as heavily circumstantial, centered on the bitter post-divorce relationship rather than forensic proof tying Chandler to the bedroom shooting.
In 2018, the Kansas Supreme Court overturned the 2012 convictions after finding prosecutorial misconduct. Coverage of the disciplinary fallout later described Shawnee County prosecutor Jacqie Spradling as having been disbarred over a pattern of unethical conduct tied to the case, including false or unsupported arguments to the jury.
Prosecutors retried Chandler. The 2022 retrial ended in a hung jury, per WIBW. The state tried her a third time in Pottawatomie County. On March 7, 2025, a jury found her guilty of two counts of first-degree murder. On June 3, 2025, Kansas Reflector reported that she received consecutive life sentences with no parole eligibility for 50 years. Chandler continued to deny guilt at sentencing and said she would appeal.
Who Are the Umbehrs, and Why Does the Series Follow Them?
HBO’s synopsis and Rolling Stone’s reporting both place Eileen and Keen Umbehr at the center of the series’ present-day engine. The Umbehrs became convinced Chandler did not commit the murders and spent years pushing journalists, lawyers, and courts to reopen the narrative.
Sexton has said Eileen emailed him relentlessly for more than two years with records and transcripts before he engaged. The series, filmed over roughly six years according to HBO’s materials, follows that reporting path: citizen advocates, a veteran journalist, competing family theories, and a court record that keeps changing without producing an undisputed forensic story of the bedroom shooting.
That framing matters for readers. A Killer Story is not only a retelling of July 7, 2002. It is also a documentary about how true-crime attention, prosecutorial failure, and activist certainty can reshape a case long after the crime scene is sealed.
What Material Does the Docuseries Emphasize?
Press around the series emphasizes materials that were already in the public fight: trial testimony, appellate findings about prosecutorial misconduct, the absence of decisive DNA or fingerprints at the scene, and the Umbehrs’ years of advocacy. Rolling Stone quotes the filmmakers describing the project as a story about storytelling and confirmation bias as much as a whodunit.
HBO’s own episode descriptions underline that approach. Episode two focuses on a “person of interest” theory pushed during retrial. Episode three covers Chandler’s decision to represent herself and a verdict that closes the legal chapter without promising epistemic closure.
If you have not watched yet, treat producer and press language carefully. “Exclusive” access and first-time interviews are not the same thing as newly discovered proof of who fired the shots in Harkness’s bedroom.
What the Public Record Still Leaves Open
A jury’s 2025 guilty verdicts are the current legal outcome. They are not a substitute for physical evidence the earlier investigations never produced, and they do not erase the Kansas Supreme Court’s finding that the first conviction was tainted by misconduct.
Chandler maintains her innocence and has said she will appeal. Family members of Sisco and Harkness have described the third trial’s sentence as long-delayed accountability. Those positions can both be true as statements of belief while the appellate record is still live.
Readers looking for “where is she now” answers should treat prison status and appeal dockets as moving targets and check Kansas court and corrections records for the latest filing. For a wider map of cases still generating 2026 search spikes, see Bamfuzzle’s true crime cases with the biggest 2026 updates.
FAQ
Is A Killer Story on HBO and Max right now?
Yes. Per HBO’s announcement, the series premiered Sept. 10, 2026, on HBO and streams on Max, with weekly Thursday episodes through Sept. 24.
What were Mike Sisco and Karen Harkness killed by, and where?
They were found shot to death in bed in Harkness’s Topeka home on July 7, 2002. Use that scene description consistently; do not substitute driveway, garage, or other locations that are not in the court coverage.
Why was Dana Chandler’s first conviction overturned?
The Kansas Supreme Court overturned the 2012 convictions after finding prosecutorial misconduct. Later reporting tied the disciplinary case against prosecutor Jacqie Spradling to false or unsupported claims made to the jury and related ethics violations.
What was the result of the third trial?
In March 2025, a Pottawatomie County jury found Chandler guilty of two counts of first-degree murder. In June 2025, she was sentenced to consecutive life terms with no parole eligibility for 50 years, according to Kansas Reflector. She said she would appeal.
Does the docuseries prove Chandler is innocent or guilty?
No documentary can replace a verdict or an appellate ruling. HBO’s materials and press interviews describe a series that tracks competing narratives and the limits of certainty. The current legal status is the 2025 convictions and life sentences, subject to appeal.
Sources
- HBO announcement via The Futon Critic (Aug. 31, 2026): format, premiere window, Max streaming, episode titles and dates, production credits.
- Media Play News (Aug. 31, 2026): secondary confirmation of HBO/Max premiere and synopsis.
- Rolling Stone, CT Jones (Sept. 12, 2026): Sexton/Umbehr reporting path; series framing; case background quoted from participants.
- WIBW (March 7, 2025): third-trial guilty verdict; victims found shot in bed in Topeka home; prior hung jury.
- Kansas Reflector, Tim Carpenter (June 3, 2025): consecutive life sentences; 50-year parole minimum; Chandler’s innocence claim and appeal intent.
