John D. Grantz, age 86. Retired C.P.D. after 39 years. Beloved husband of Joan (nee Kowalski); loving father of Joan (Joseph) Strainis, Donald Grantz, Michael (Grace) Grantz, Richard Grantz, and the late John Grantz; dearest grandfather of 7; cherished brother of Dolores Grantz. Visitation Tuesday 3 to 7:30 p.m. at Richard Modell Funeral Home & Cremation Services, 5725 S. Pulaski Road. Funeral and Interment will be held privately. For info: (773) 767-4730 or www.richardmodellchicago.com