The person at the center of this case
Walter A. Mosier
Homicide · Open
20 years waiting · since 2006
WALTER A. MOSIER - SENECA, MISSOURI
Justice for Walter A. Mosier — the trail went cold in 2006, but the truth hasn't.
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Key leads to think about
🎯
suspect
Lead #1Who was responsible for the homicidal violence against Mosier?
⏰
timeline
Lead #2What occurred between September 15, 2006 in Seneca and Mosier's death?
📍
location
Lead #3Why were Mosier's remains left near Interstate 44 in Sullivan, and does this location suggest a connection to the perpetrator?
Walter A. Mosier, a 51-year-old white male, disappeared from Seneca, Missouri on September 15, 2006. His skeletal remains were discovered six months later near Interstate 44 in Sullivan, Missouri, with the medical examiner determining he died from homicidal violence involving blunt force trauma to the head and sharp force trauma to the neck and chest. The Franklin County Sheriff's Office continues to seek information from anyone with knowledge of Mosier or details about his death.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
👁️
witness
Lead #4Did anyone observe suspicious activity near Seneca on September 15, 2006 or near the Flying J Travel Center area in Sullivan?
💡
clue
Lead #5What circumstances led to the discovery of Mosier's remains, and were there any associated evidence at the scene?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
September 15, 2006 Seneca, Missouri On September 15, 2006, Walter A. Mosier was last seen in Seneca, Missouri.
On March 15, 2007, the skeletal remains of Mosier were located next to Interstate 44 and a quarter mile south of the Flying J Travel Center (truck stop) in Sullivan, Missouri. According to the medical examiner, Mosier had been deceased for approximately six months.
Mosier’s cause of death was identified as homicidal violence including blunt craniocerebral trauma and blunt sharp trauma of the neck and chest. Franklin County Sheriff’s office is seeking information from anyone who may have known the victim or may have information on this case.
Timeline of Events
👁️
2006-09-15
Last Seen
Walter A. Mosier was last seen in Seneca, Missouri
🔍
2007-03-15
Remains Discovered
Skeletal remains of Mosier located next to Interstate 44, approximately a quarter mile south of the Flying J Travel Center in Sullivan, Missouri
🕵️
2007-03-15
Medical Examiner Report
Cause of death determined to be homicidal violence including blunt craniocerebral trauma and blunt sharp trauma of the neck and chest; estimated time of death approximately six months prior
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:September 15, 2006
Last Updated:October 23, 2026
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Case Information
Incident:September 15, 2006
Last Updated:October 23, 2026