The family of Cook County Clerk Karen Yarbrough announcing a public memorial service will take place at 3 p.m. on Sunday, April 14 at the Rockefeller Chapel on the campus of the University of Chicago in Hyde Park. Doors will open at 2:30 p.m. The 73 year old died last Sunday after an undisclosed illness and a brief hospital stay. She is survived by her husband Henderson Yarbrough, six children and 12 grandchildren.