Overview of MURDERED: Stephanie Casberg (Audiochuck / Crime Junkie)
This episode revisits the 1969 unsolved murder and dismemberment of 17–18-year-old Stephanie (name spelled in sources as Casberg / Kasper / Casper) whose partial remains were found along Root River and nearby sites in Racine County, Wisconsin. Hosts outline the discovery, key forensic evidence, the many suspects and tips that have come and gone over five decades, DNA developments, and a fresh line of inquiry sparked when a local detective heard a Crime Junkie callout about a possible military-linked suspect.
Timeline — key events
- July 9–10, 1969: Riverbank hunters/fishermen discover dismembered human remains in several piles along Root River near a condemned trestle bridge on Eight Mile Road. Torso and left leg initially missing.
- July 10, 1969 (early): Charlie (Charles) Casper confirms the remains are his daughter Stephanie, who would have turned 18 the next day. Last confirmed seen leaving Mark’s Big Boy restaurant in Milwaukee after her midnight shift (around 12:30 a.m. on July 7th/6th depending on accounts).
- July 11–12, 1969: Items (gold clutch purse, appointment book, wallet inserts with SS card and driver's license application, photographs) turn up along a rural Franklin road — likely belongings from her purse.
- July 21, 1969: Additional bones recovered from a white cardboard “sun‑kissed” box found near a farmhouse ~4.5 miles from the bridge, with a towel containing pubic hairs — confirming more of Stephanie’s remains.
- 1969–1980s: Numerous tips, suspects and local rumors (including family accusations) investigated; case grows cold.
- 1988: A woman (“Pam”) calls alleging her brother Michael Bartelt (a former Big Boy cook) was involved; police re-interview suspects and check alibis.
- 2009 & 2015–2016: Forensic testing begins on preserved pubic hairs and other items; anonymous tip points to Wilbert Mackey (deceased by 2009), but DNA comparisons exclude him.
- 2009–2024: Partial male DNA profiles obtained from hairs; multiple exclusions (Michael Bartelt, the restaurant manager, Michael’s brother Dan, and Wilbert Mackey). Michael Bartelt dies of sepsis June 3, 2024 before some further testing could be completed.
- 2023–present: Racine County Lt. Brian Van Sock reopens threads; a new suspect (military‑connected, alive) is being pursued after Van Sock heard a Crime Junkie callout and recognized patterns — investigation ongoing.
Crime scene & forensic evidence
- Remains: Dismembered, with precise cuts at joints suggesting skill/knowledge; pathologist determined most dismemberment occurred postmortem. Two small puncture wounds beneath the right side of the chin and a large neck cut likely severing an artery — probable cause of death.
- Missing parts: Initially missing torso and left leg; later bone recovery filled many gaps but some bones remained unaccounted for.
- Items at scene and nearby:
- Milwaukee Sentinel (June 24) used to wrap parts; cigarette butts pressed in folds.
- Brown leather shoe recovered with remains.
- Military‑style jacket (patches removed) found ~8 feet away; caked with mud and looked aged.
- Burned paper matchsticks near remains (paper itself not burned).
- Gold clutch‑style purse, appointment book, wallet inserts with SS card and driver’s license application, photos found on a rural Franklin road.
- White cardboard box near farmhouse contained bones and a towel with pubic hairs.
- Forensic testing:
- Pubic hairs (sent for testing only in 2009): produced two different partial male DNA profiles; one was strong enough for state databases but produced no matches. Profiles were not strong enough to determine kinship between them.
- Cigarette butts: no usable DNA.
- Recent wet‑vac extraction (military jacket, towel): revealed male DNA in very low quantities — insufficient to build profiles or match to partials yet.
- Multiple direct comparisons ruled out several named people (see Suspects).
Suspects, persons of interest & tips
- John (Stephanie’s boyfriend): 22‑year‑old serviceman; last to say he saw her (claims he dropped her off ~4 a.m. after a party). He’s repeatedly cleared: car and alibi didn’t fit sightings; DNA exclusions later.
- Restaurant staff and associates:
- Michael Bartelt: 20‑year‑old cook who recently returned from Vietnam; originally told police he saw Stephanie leave the back door and later claimed he left early and didn’t see her. Allegations from a woman named “Pam” implicate Michael (and possibly his brother Dan); Michael allegedly lied about a Hawaii trip and had a juvenile indecent behavior charge. Michael was a longstanding family suspect; investigators found time‑card discrepancies suggesting he may not have been working that night. Michael was tested and excluded from the hair DNA; he died June 3, 2024.
- Restaurant manager: Described as “eager” and gave suspicious comments (psychic predicting killer initials RS = his initials). He was tested and excluded from the hair DNA.
- Other young male employees (17‑year‑old busboy, other teens): Investigated in 1969/70s, including arrests for other violent crimes in the area. None were tied definitively to Stephanie’s murder.
- Wilbert Mackey: Lived near Eight Mile Road; family members reported he bragged of being the “Root River killer,” abused children, and forced his daughter to help dispose of bags in the river. He died in prison in 2009 for child sex offenses. DNA comparisons excluded him.
- Family rumors: Some family members speculated Charles (Stephanie’s father) or alternative motives (gambling debts) — investigators found no evidence supporting these claims; Charles reportedly made an unsettling remark to police (“if I had, you never would have found her”), but no proof connected him to the crime.
- New suspect (unnamed, military connection): Lt. Van Sock became interested after hearing a Crime Junkie episode callout about a military‑connected man suspected in similar dismemberment cases (e.g., Kristen David case in Idaho). He is pursuing ties between that person and Stephanie’s case; this is an active, ongoing line of inquiry but details and results are not yet public.
Investigative hurdles & developments
- Era limitations: 1969 predated modern DNA forensics; early investigations relied on witness statements, time cards, and physical evidence that degraded over time.
- Jurisdictional complexity: Evidence and sightings spanned Milwaukee, Franklin and Racine counties, complicating coordination.
- Evidence condition: Many items were degraded or tested only decades later; low‑quantity DNA on jacket/towel limits immediate matches.
- Rumors & family accusations created noise and distracted resources at times.
- Forensic advances: Partial DNA from pubic hairs (2009) and renewed lab techniques (MBAC wet‑vac extraction) provided new leads but not definitive matches yet. Investigators continue to reanalyze evidence as tech improves.
- The newest investigative push emerged after a detective recognized pattern similarities with another dismemberment case and is actively pursuing that suspect.
Working theories
- Lt. Brian Van Sock’s current working hypothesis: Stephanie likely left work upset (boyfriend had fallen asleep and missed picking her up), accepted a ride from a stranger, was sexually assaulted, killed (neck wound), and then dismembered and dumped by someone with time, control and some anatomical skill — possibly a transient or stranger rather than a co‑worker or family member.
- Family theory: Many Bartelt family members and some neighbors continue to suspect Michael Bartelt (lies about travel, juvenile offense, local knowledge of dump sites). Investigators have repeatedly tested and vetted these leads but have not produced conclusive evidence.
What remains unresolved
- Identity of the killer(s) who carried out the dismemberment and disposal.
- Origin of the two partial male DNA profiles from pubic hairs and whether they belong to the perpetrator(s).
- Why certain personal items (e.g., photographs found torn) can’t be conclusively linked to Stephanie or how multiple disposal sites were chosen.
- Whether the new military‑connected suspect can be linked to Stephanie and/or other regional cases.
How the public can help (action items)
- If you have information about Stephanie’s death (1969) or sightings, vehicles, people in Milwaukee/Racine/Franklin in July 1969, contact:
- Racine County Sheriff’s Office Detective Bureau: 262‑636‑3225
- Crime Stoppers (anonymous): 888‑636‑9330
- Share archival photos, employment records, timecards, or family stories from that era; even small details can help triangulate timelines.
Main takeaways
- Stephanie’s killing was brutal and methodical; evidence suggests the offender had time, privacy and some proficiency in dismemberment.
- Decades of tips produced many suspects and rumors but no conviction; forensic advances produced partial DNA leads but no matches to date.
- A renewed, active investigation is underway after recent reexamination of evidence and a new suspect link prompted by a podcast callout — the case remains open and investigators continue to pursue definitive leads.
- Authorities welcome new information; public tips remain critical to resolving this cold case and giving the family answers.