RIORDAN - John B., Korean War Veteran and Retired Nassau County Police Officer died at 87. John is survived by his wife of 60 years, Mary and his four children, Evelyn, Thomas, John (Carolyn) & Brian (Patti). He was the cherished grandfather to Ashley Kate, Brenna, Allison, Matthew, Ryan & Jaime. A Mass will be held at St. Agnes Cathedral in Rockville Centre at 10:00 a.m. on Friday, May 6th, 2016.