Sandra O. Dempsey of Irving, died on Wednesday, December 14, 2016 at the age of 76. Born April 11, 1940 in Los Angeles, California to Frank L. Riise and Violet (Hunter) Riise Feldhusen. Sandra was a food service manager for over 37 years at Kellers Drive-in. She is preceded in death by her father. Sandra is survived by her children, William Bill Caldwell, Jr. of Sachse, Lonnie Caldwell of Grand Prairie, Debra Denise Willis, David Dean Dempsey; six grandchildren; seven great-grandchildren; mother, Violet Feldhusen; half-brothers, Ronald Alcardi of Las Vegas, Nevada and Dennis Riise of Irving. A memorial service was held on Monday, December 19, 2016 at Donnellys Colonial Funeral Home. Chaplain Emil Balliet of the Grand Prairie Police Department officiated.