Incident
Deputy Sheriff Walter Mann was shot and killed on Kaskaskia Island on the Mississippi River as he and the sheriff attempted to arrest a man for shooting at a neighbor. As they arrived at the man's home he shot Deputy Mann through his glass front door killing him instantly. The sheriff apprehended the suspect later in the day.
On November 19th, 1928, the subject was convicted of Deputy Mann's murder and sentenced to life. He died in prison January 16th, 1935.
Deputy Mann was survived by his wife and four children.
Survivors
Deputy Mann was survived by his wife and four children.
In Our Keeping
- Permanent identifier
BO-US-IL-00AD2AAC- Stewardship
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- Added to badge.nw
- April 2, 2026
- Last updated
- July 23, 2026
Honored here by 1 sentinel - 1 tribute.
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Tributes
I never knew you. I am standing here anyway.
Deputy Sheriff Mann served with the Randolph County Sheriff's Office.
Thank you for your service to the Chester community. Gone but never to be forgotten.
Rest easy, Deputy Sheriff Mann.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Deputy Sheriff Walter H. "Doc" Mann is one of 17,623 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 54.2% of all 32,508 officers honored here.
In IL, 842 of 1,318 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 63.9% of this state's fallen. That is 9.7 percentage points above the national rate of 54.2%.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Walter H. "Doc" Mann's cause is highlighted.
How Walter H. "Doc" Mann Compares
Offender Outcome
Died in prison
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Walter H. "Doc" Mann is highlighted in May.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Walter H. "Doc" Mann was killed by shotgun.