Jay E. Fleckenstein, 39 of Sioux City, passed away on Friday, April 17, 2015 at his residence from natural causes. Funeral Services will be at 10:30 a.m. Tuesday, April 21, 2015 at the Orpheum Theater in Sioux City. A private family burial will follow in Logan Park Cemetery. Visitation will be Monday, April 20th from 4:00 p.m. until 8:00 p.m. at the Orpheum Theater with family present at 5:00 p.m. and a Prayer Service beginning Monday evening at 7:00 p.m. In lieu of flowers, family requests memorials be made to the Friends of the Sioux City Police Department in care of the K-9 Unit. Meyer Brothers Colonial Chapel is assisting the family with arrangements. Jay was born on May 24, 1975 in Sioux City to John A. and Pamela J. Fleckenstein. He received his education in the Sergeant Bluff Schools, graduating with the Class of 1993. Jay received his Bachelor Degree from the University of South Dakota in Criminal Justice before fulfilling a life-long dream of becoming a Police Officer by joining the Sioux City Police Department in 1997. He began his career as a patrolman, was a member of the Alcohol Safety Action Program, and was a detective in the Crimes Against Persons Unit. Jay furthered his career by becoming a member of the K-9 Unit with his trusted service dog, Eik. He was promoted to the position of Sergeant of the K-9 Unit with the Sioux City Police Department. Jay loved training dogs and teaching obedience classes. He has won numerous awards, including exceptional duty awards, and Top Honors in 2010 at the National Detector Trials. Jay was an instructor for the Citizens Academy of the Sioux City Police Department, a firearms instructor, a member of the SWAT team, was a loving and protective brother, and would do anything for his family. Jay's drive was to always do what's right. There was little "grey" area with Jay, decisions were either right or wrong, and that's how he expected other's to live. Jay is survived by his father John A. Fleckenstein and his wife Janet of Sergeant Bluff, IA; mother Pamela Fleckenstein of Lakeland, FL; sister Jamie Fleckenstein of Omaha, NE; brother Josh Fleckenstein and his wife Samantha of Sergeant Bluff, IA and brother Jacob Fleckenstein and his wife Sara of Ankeny, IA; the love-of-his-life Nicole Jensen of Sioux City; his beloved Eik, and numerous extended family. Jay was preceded in death by his grandparents, Aunt Barb, cousin Mac Fleckenstein, cousin Emily Schultz, and beloved dogs Reign and Indy.