The circumstances surrounding Ruben Borchardt's death made it look like a home invasion. But police were able to determine that he was the target in the attack. To find a suspect, police began looking within the household. They learned that Ruben was having problems with his wife, Diane Borchardt, a 45-year-old teacher's assistant at the high school. Detectives also learned that the couple was going through a bitter divorce.
Within hours of the investigation, the Borchardt children told investigators that their stepmother, Diane Borchardt, mistreated them and abused their father. According to their side of the story, the household was rife with arguments and physical fights.
Police believe that Diane Borchardt asked her student Doug Vest to kill her abusive husband. Authorities say she told her study hall students untrue stories about Ruben Borchardt so the teens could feel sorry for her, according to People.
Wisconsin investigators believe the Jefferson crime was motivated by jealousy of Ruben Borchardt's new girlfriend and anger regarding Diane Borchardt's loss of her home and stepchildren in the divorce proceedings.
By all accounts, Diane Borchardt turned out to be a big disappointment to Ruben Borchardt, who believed that he married a good wife and mother to his kids. It was a rude awakening for the hardworking father when he realized that Diane was a manipulative woman with dangerous tendencies.