George K. Costello George K. Costello, 79, of Crystal Lake, died Wednesday at home. He served in the Army during World War II. He was co-owner of Essex-Costello Real Estate in Crystal Lake and was on the Crystal Lake High School board from 1959 to 1968, serving as president from 1966 to 1968. Mr. Costello's survivors include his wife, Rita; five daughters, Kathleen Lenth, Jeanne Anne Quinn, Mary Toohey, Rita Kreeger and Carol Hartinger; a son, Kevin; a brother, John; and 18 grandchildren. Visitation will be from 3 to 7 p.m. Sunday in Querhammer Funeral Home, 500 W. Terra Cotta Ave., Crystal Lake. Mass will be said at 10 a.m. Monday in St. Thomas the Apostle Catholic Church, Illinois Highway 176 and Oak Street, Crystal Lake.