The provided episode examines the murder of Julie Jensen, who was poisoned with antifreeze by her husband, Mark Jensen, in Pleasant Prairie, Wisconsin, in 1998. It details the troubled marriage that preceded her death, including Julie's documented fears and a chilling letter she wrote naming Mark as a suspect if anything happened to her. The source describes the investigation, relying on forensic evidence like ethylene glycol detection and incriminating computer searches, along with witness testimonies. It also traces the prolonged legal battles, including two trials and appeals concerning the admissibility of Julie's letter, ultimately leading to Mark's conviction for first-degree intentional homicide.

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