What I do kinow is that my grandfather was a millright and lived in Dolton his whole life.The distillery your William worked in was located at the intersection of Indiana Avenue and the Calumet River in what was know as Riverdale.
Google Cook County Records and you can join at no cost.You can search free and you will find three to four William Krueger death dates.There were may William Kruegers in the USA as you know.I have tried to search the Chicago Tribune to get an obit with no success.
Is there any chance you know where they lived in Dolton?At the time therewere only 448 people in Dolton in 1880.It was easy to walk from Dolton to the distillery.
Do you know where in Prussia your Kruegers came from?
I will check the neighbors to see if either will be my great grandparents.
If they are I assume, we are releated and that your part of the family tree and ours should be recorded or traded.