Roll of Honor
Incident
Patrolman William Caisse and Illinois State Trooper Michael McCarter were shot and killed during a traffic stop at the 259-mile marker on I-57, two miles south of Paxton. At about 9:00 pm, Patrolman Caisse was dispatched to assist Trooper McCarter who was attempting to stop four speeding vehicles traveling southbound. Once at the scene, one subject fled to an overpass area and began firing at both officers, mortally wounding Trooper McCarter and a civilian who was riding with him. Upon arrival of another Paxton officer, gunfire continued from the overpass area as another subject retrieved a rifle from the rear of his pickup truck, shooting Patrolman Caisse in the back, killing him instantly. That suspect then began firing at the other officer, wounding him in the right leg and chest, before he was able to return fire four times with a shotgun. As the suspect fell to the ground and reached for his weapon, the officer fired his revolver and killed him. The four subjects, all brothers and members of an auto parts theft ring based in Detroit, were traveling from Michigan to Mississippi to attend their grandmother's funeral and feared the officers would find their weapons when they were stopped. A third brother was also killed in the shootout while a fourth was not implicated in the incident. The suspect who fired from the overpass area was found wounded the following day. He was convicted of first-degree murder and sentenced to death. His sentence was twice overturned and he was later re-sentenced to life in prison without parole. In 1993, the Illinois Appellate Court affirmed the offender's sentence. Patrolman Caisse had served with the Paxton Police Department for three years and was a US Army veteran of the Vietnam War.
Survivors
He was survived by his wife, son, two daughters, parents, four brothers and sister.
In Our Keeping
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BO-US-IL-3BFC680A- 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 served 1985 to 1993. You served too, before the badge - different uniform, same idea. You go where you are sent and you do not get to pick the call.
Patrolman Caisse gave the Paxton Police Department 3 years.
Thank you for your service to the Paxton community, and for your service before it. Gone but never to be forgotten.
Rest easy, brother.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Military Service
William O. Caisse served in the Other (1966â1969) before joining law enforcement.
Patrolman William O. Caisse 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. William O. Caisse's cause is highlighted.
How William O. Caisse Compares
Offender Outcome
Two shot and killed
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. William O. Caisse is highlighted in Apr.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. William O. Caisse was killed by rifle.