I don't have much information for you, except a little story about a Waukegan CAMPBELL.
My best friend, over 10 years ago was Tina Campbell. She was married to Calvin Campbell. Tina died on Oct 2, 1994 of Leukemia and her hubby, I heard, moved to Oregon, I believe Medford or Eugene. She was 39 years old and her hubby was about 4 years older, but not certain.
I don't remember Cal (as Tina called him) ever mentioning a brother living here in Waukegan, but he did say he had a single sister living in CA. I believe Cal's parents live/d in Medford, Oregon, maybe in Eugene.
Best of Luck in your search.