Husband Kills Wife with Antifreeze for His Mistress

Murder Files Unsealed · Jul 2, 2026 · 48m · transcript

This source details the criminal case of Mark Jensen, a Wisconsin man convicted of murdering his wife, Julie Jensen, by poisoning her with antifreeze. While the defense argued that Julie’s death was a suicide driven by depression, prosecutors presented evidence of Mark’s long-term psychological torture and his desire to replace her with his mistress. Key evidence included incriminating internet searches for toxins and a letter written by the victim before her death expressing fear that her husband would kill her. Although the initial conviction was overturned due to constitutional disputes…