Hometown: Lexington, MA
Family: Surviving David are his father and mother, James Cannon Johnston and Mary Hazen Johnston of Lexington, Massachusetts; sister Rachel Johnston Rodriguez of New York City; brother Peter Hazen Johnston and his wife Xiomara Henriquez Johnston and their children Andrew Henriquez Johnston and Victoria Henriquez Johnston, of New York City; brother Matthew Hazen Johnston of Chicago, Illinois; sister Anne Hazen Johnston of Madison, Wisconsin; brother Samuel Hazen Johnston and his wife Savannah Eccles Johnston of Hawthorne, California; and grandmother Charlotte Cannon Johnston of Chicago, Illinois, and Shelley, Idaho.