The person at the center of this case
Jessie Wallace Cook
Cold Case · Open
9 years waiting · since 2016
JESSIE WALLACE COOK
Justice for Jessie Wallace Cook — the trail went cold in 2016, but the truth hasn't.
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Key leads to think about
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suspect
Lead #1Who was responsible for the blunt force trauma to Jessie Cook's face and head?
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witness
Lead #2Were there any witnesses present near the water tower on the morning of October 29, 2016, or in the hours preceding the discovery?
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timeline
Lead #3What were Cook's movements and associations in the days or hours before his death?
On October 29, 2016, Jessie Wallace Cook, a 32-year-old enrolled member of the Cheyenne River Sioux Tribe, was found deceased near a water tower in Eagle Butte, South Dakota, with severe facial injuries caused by blunt force trauma. The identity of the person or persons responsible for his murder remains unknown, and investigators have not publicly disclosed a motive or suspect. The FBI and Cheyenne River Sioux Tribe Law Enforcement Services continue to seek information from the public, offering a $10,000 reward for leads that could identify and convict Cook's killer.
Case
#436
FBI Minneapolis Field Office and Cheyenne River Sioux Tribe Law Enforcement Services
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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 physical evidence was recovered from the scene, and does it point to a weapon or method used in the attack?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
Homicide Victim Eagle Butte, South Dakota On or about October 29, 2016 The FBI's Minneapolis Field Office in Minnesota, along with the Cheyenne River Sioux Tribe Law Enforcement Services in South Dakota, are seeking the public's assistance in identifying the unknown individual(s) responsible for the murder of Jessie Wallace Cook in Eagle Butte, South Dakota. On October 29, 2016, Cook, then 32 years old, was found on the ground, unresponsive, near the water tower on the corner of Willow Street and Highway 212 in Eagle Butte, South Dakota.
He was pronounced deceased at approximately 9:00 a.m. the same day.
Cook had severe facial damage, and the autopsy determined blunt force injury to be the cause of death. Remarks: Cook was an enrolled member at the Cheyenne River Sioux Tribe Indian Reservation.
Timeline of Events
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2016-10-29
09:00Body Discovery
Jessie Wallace Cook found unresponsive on the ground near the water tower at the corner of Willow Street and Highway 212 in Eagle Butte, South Dakota. Pronounced deceased at approximately 9:00 a.m.
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2016-10-29
Autopsy Findings
Autopsy determined blunt force injury to the head as the cause of death. Cook had severe facial damage.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:October 29, 2016 at 9:00 AM
Last Updated:July 25, 2026
Up to $10,000 Reward
For information leading to the resolution of this case
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Case Information
Incident:October 29, 2016 at 9:00 AM
Last Updated:July 25, 2026
Up to $10,000 Reward
For information leading to the resolution of this case