On April 1, 2022, the Illinois State Police will mark 100 years of serving the people of the the State of Illinois. Celebrations, commemorations, activities, publications, and such are already in the planning stages, and some in actual process.
The Illinois State Police Heritage Foundation is working to coordinate many of the activities, and has an “events” page on their website that will list significant events as they are finalized.
One thing, I would recommend you watch a video that is posted on the Homepage of their website. It is titled, “Not Forgotten…” It is a moving video about the Foundation’s work to build a Memorial to the Fallen Illinois State Police Officers, and includes interviews with family members of a few of the Fallen.