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[The Decades-Long Mystery of the Root River: The Case of Stephanie Kasberg]-[MURDERED: Stephanie Casberg]

Crime Junkie · B2 · 2026-04-20

True crime
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📋 Summary

The Tragic Disappearance of Stephanie Kasberg

In July 1969, eighteen-year-old Stephanie Kasberg vanished after her waitressing shift at a Milwaukee "Mark's Big Boy" restaurant. Her disappearance marked the beginning of a haunting mystery that would span decades. Days after she was last seen, her dismembered remains were discovered scattered along the Root River in Racine County, Wisconsin. The condition of the remains—described by investigators as "deliberate" and "methodical"—suggested the work of someone with significant "skill, patience and time."

A Trail of Evidence and False Leads

Investigators were immediately faced with a gruesome scene. Her torso and left leg were missing, and the remains were wrapped in a Milwaukee Sentinel newspaper dated June 24th, accompanied by cigarette butts and a "military style jacket" caked in mud. Despite the discovery of personal items—including a gold clutch, an appointment book, and photos—along a roadside in Franklin, the investigation quickly stalled.

Throughout the decades, the case was plagued by unreliable rumors and suspicious figures. One early suspect was a restaurant manager who exhibited strange behavior, while another, a cook named Michael Bartelt, provided conflicting accounts of his movements on the night of the murder. Bartelt claimed he had planned a trip to Hawaii, a story later debunked by his own sister, who alleged that he and another brother were capable of such violence.

The Struggle for Forensic Answers

As forensic technology evolved, investigators attempted to utilize evidence from the crime scene, including pubic hairs found on a towel inside a "sun-kissed box" where more of Stephanie’s remains were discovered weeks later. However, initial DNA testing yielded only partial profiles. Over the years, suspects like Michael Bartelt, his brother Dan, and a local man named Wilbert Mackey (who had been accused by his own children of being a serial killer) were all excluded through DNA comparison. The case remained cold, with investigators struggling against "jurisdictional barriers" and the loss of potential evidence.

A New Hope for Justice

In 2023, a breakthrough occurred when Lieutenant Brian Van Sock, currently leading the investigation, discovered a potential link to a suspect mentioned in a previous Crime Junkie episode regarding the murder of Kristen David. The similarities—including the "surgical-like precision" of the dismemberment and the use of newspaper to wrap remains—have opened a new, active line of inquiry.

While Michael Bartelt passed away in 2024, the investigation remains deeply active. Lieutenant Van Sock continues to pursue the truth, aiming to "rule everyone in or out definitively." For the Kasberg family, the loss of Stephanie continues to ripple through generations. The Racine County Sheriff’s Office maintains that the case is not closed, and they continue to urge anyone with information to come forward, hoping that modern DNA advancements and persistent detective work will finally provide justice for Stephanie.

🎯Key Sentences

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I mean, she just graduated high school and she was like eager to be out on her own.
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Sneaking around with John is probably one of the reasons Stephanie had been out of the house more recently.
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I'd have been mad if my boyfriend fell asleep and forgot to pick me up.
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That seems bizarre.
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And he is adamant if remains had been there they would have seen them, because they're not far from the bridge.
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📝Key Phrases

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point the finger at
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catch one's eye
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lean toward the theory
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have something to go off of
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cross paths
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📖 Transcript

Hi Crime Junkies, I'm your host Ashley Flowers.
And I'm Britt.
And the story I have for you today is one that's hung over a corner of Wisconsin for decades.
In the summer of 1969, a teenage girl walked out of a restaurant after her waitressing shift and was never seen alive again.
What turned up later, scattered in pieces across Racine County, told investigators that they were dealing with someone who had skill, patience and time.
Since then, this case has pulled detectives in every direction, from a co-worker whose own family has been pointing the finger at him for years, to a man who terrorized his children repeatedly by claiming he was the killer.

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