An 84-year-old man from Minnesota was recently sentenced to life in prison for a murder he committed over 50 years ago. Jon Miller pleaded “no contest” to one count of first-degree murder for the killing of Mary K. Schlais in 1974. Schlais, who was 25 years old at the time, was found dead near a wooded intersection in Wisconsin on February 15, 1974.
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According to the Dunn County Sheriff’s Office in Wisconsin, Schlais was believed to be hitchhiking from her home in Minneapolis to Chicago for an art show when she encountered Miller. Despite extensive investigations, including following tips and leads, conducting interviews, and examining evidence, the case went cold for decades until recent developments.


Authorities were able to make an arrest more than 50 years later by utilizing genetic evidence from a stocking cap found near Schlais’ body. Miller, who was initially difficult to track down due to being adopted, denied knowing about the murder when first questioned by investigators. However, when confronted with DNA evidence, Miller admitted to picking up Schlais while she was hitchhiking and making advances towards her.
Miller confessed to using a knife from his car to stab Schlais multiple times in the back after she refused his advances. An autopsy revealed that she had been stabbed more than a dozen times. Miller then attempted to conceal Schlais’ body in a snowbank but fled when a car passed by. He also admitted that the stocking cap found near the crime scene belonged to him.
Family members of Mary Schlais expressed their relief and gratitude for the resolution of the case after decades of uncertainty. Mary Schlais’ niece, Nina Mary Schlais, described her aunt as a brilliant and independent woman with various talents and interests. She emphasized that justice knows no time limit and encouraged other families seeking closure to remain persistent in their pursuit of truth.
The arrest and sentencing of Jon Miller serve as a reminder of the unwavering dedication of law enforcement and advancements in forensic science that can lead to long-awaited justice. The case highlights the importance of perseverance, DNA technology, and the collaborative efforts of authorities in solving cold cases and providing closure for victims’ families.
As news of this decades-old murder investigation unfolds, it sheds light on the significance of never giving up on seeking justice and closure for victims of violent crimes. The tragic story of Mary Schlais serves as a poignant reminder that the pursuit of truth and accountability can transcend time and bring solace to those affected by past tragedies.
The resolution of this cold case offers hope to other families grappling with unsolved crimes, demonstrating that relentless efforts and advancements in investigative techniques can ultimately lead to answers and resolution. The closure brought about by Jon Miller’s conviction underscores the enduring impact of justice and the perseverance of those committed to upholding it.
