The series showcases retired Colorado Springs police detective Lt. Joe Kenda as he examines murder cases from the 911 call to the resolution of the case. Kenda is a retired Colorado Springs detective whose work acts as the main focus of the series. Through re-enactments of the cases, discussions with investigation teams, and interviews with victims' families, the show highlights Kenda's successes with his 400 homicide case history and 92 percent solve rate.