The person at the center of this case
Walter A. Mosier
Homicide · Open
19 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
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timeline
Lead #1What happened to Mosier between his disappearance in Seneca on September 15, 2006 and his death approximately six months prior to discovery?
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location
Lead #2Why were his remains deposited near the Flying J Travel Center on Interstate 44 in Sullivan, Missouri?
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suspect
Lead #3Who had contact with Mosier in Seneca and may have been involved in his death?
Walter A. Mosier, a 51-year-old man, disappeared from Seneca, Missouri on September 15, 2006, and was found dead six months later near a truck stop in Sullivan, Missouri. His death was ruled a homicide caused by blunt force trauma to the head and sharp force injuries to the neck and chest. The Franklin County Sheriff's Office continues to seek information about who killed Mosier and the circumstances surrounding 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.
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evidence
Lead #4What evidence exists regarding the blunt force trauma and sharp force injuries that caused his death?
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
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2006-09-15
Last Seen
Walter A. Mosier was last seen in Seneca, Missouri
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2007-03-15
Remains Located
Skeletal remains of Mosier were found next to Interstate 44, quarter mile south of Flying J Travel Center in Sullivan, Missouri
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:September 15, 2006
Last Updated:September 10, 2026
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Case Information
Incident:September 15, 2006
Last Updated:September 10, 2026