Andrea Canning reports on the 2002 double homicide of Karen Harkness and Mike Sisco in Topeka, Kansas, in “Deadly Obsession” | Dateline

It was the end of a long Fourth of July weekend in 2002 when the awful discovery was made. Mike Sisco and Karen Harkness, a couple deeply in love, were found murdered in the basement of Karen’s home in a quiet neighborhood of Topeka, Kansas. It was a horrible scene. Both Mike and Karen had been shot multiple times. The Topeka Police Department immediately launched an investigation to find the killer. But they had no idea that an investigative and legal saga was just beginning. And it would take more than 20 years and trial after trial after trial to finally get justice. To find out what happened to Mike and Karen, you can watch the full episode “Deadly Obsession,” available now on Peacock. You can also watch on the NBC app or listen to the full story on our podcast. When you’re done with the episode, hear from the jury foreperson from 2022 murder trial. And watch Mike and Karen’s loved ones remember them as a happy couple with big plans for their future. Plus, listen to this week’s episode of Talking Dateline with Andrea Canning and Keith Morrison, in which they take you behind the scenes of the episode and answer questions from social media.