u/Impressive_Link_9302

My dad has told me multiple times that my grandmother's father was a grand dragon of the KKK in Pontiac Michigan, until he had to move down to Alabama. How would I go about proving or disproving this? I know he was a grand dragon and he gave his position to one of his priests when he left but that he brought his church with him. My father also claims to have found a check book for The Church of the Empire of the KKK in my great grandfather's old stuff.