Mary I. Halko (nee Prusak), age 87. Beloved wife for 67 years of the late Michael (retired Lt. CPD); loving mother of Debra (Paul) Brisson, Mark (Irene), Michele (David) Mariotti and Lisa (Brian) Halko-Stach; adored grandmother of Michael, Sarah, Sara, Andrew, Michaela and Matthew; dear great grandmother of Noah and Luke; fond sister of Andrew Prusak. Visitation Friday 3-8 p.m. at Thompson & Kuenster Funeral Home, 5570 W. 95th St. Lying-in-State Saturday 9 a.m. until time of service 10:00 a.m. at St. Peter & St. Paul Orthodox Church, 6980 S. County Line Rd, Burr Ridge. Interment Fairmount Willow Hills Cemetery. May her memory be eternal. (708) 425-0500