Robert L. Zimmermann age 88, of Countryside. U.S. Navy Veteran of WW II and retired FBI Agent. Beloved husband of Mary (nee Kellas); devoted father of Robert J. and Maria (James) Mercola; cherished grandfather of Melissa (Joseph) Michalski, Robert (Jessica), Michelle, Jessica, Alison and Amanda; dear brother of Barbara Curme, Florence Styx and the late Virginia Scavone, Joseph, Richard, August and Julius; uncle of many. Visitation Sunday, July 20, 3 to 9 pm at Hallowell & James Funeral Home 1025 W. 55th St., Countryside. Prayers Monday, July 21, 9:30 am from the chapel to St. Cletus Church in LaGrange for Mass at 10 am Interment Private. In lieu of flowers, Memorials to the Western Springs V.F.W. Post #10778 would be appreciated. Service Info: (708) 352-6500.