The wounds California nurse Sherri Rasmussen suffered in her final moments of life were "extensive and disturbing," but it would take more than two decades to reveal the surprising killer.
Solving this decades-old cold case took one woman's courageous choice to come forward, advances in DNA technology, and some chilling words from the killer himself.
There's a reason veteran homicide investigator Steve Spingola called Kelly Siegler "the Taylor Swift of cold cases" in the Season 7 updates special episode.
In a Cold Justice two-part special, Kelly Siegler and South Carolina investigators examine who could have stabbed and shot a married couple and their elderly mothers.
Derby Wagner-Richardson was abducted from her security post in Racine, Wisconsin, and found dead in the trunk of her car. Now, just over 37 years later, her estranged husband has pleaded not guilty.