Since the KKK was chartered as an arm of the democrat party I would say the first place to look for the suspects is the local union and democrat party headquarters.
On the OTHER hand, Michigan has a sizable population of Muzzies.
Thanks, I was wondering how soon someone would try to score political points over this story, if true.
There were competing KKK operations in the 1920s.
The KKK in the immediate post Civil War period was dedicated to corraling Negroes and murdering Republican politicians. The KKK in the 1920s was dedicated to supremacy over Negroes, Catholics and Jews ~ giving it an entirely different flavor.
Today's KKK is mostly irrelevant.