He is balding. Boone is missing one tooth in the middle right side of his mouth, and one leg is smaller in the calf than the other.
Circumstances:
David was last seen at approximately 3:00 p.m. at his residence in the vicinity of the 26300 block of Town Center Drive in Foothills Ranch, California. He has never been heard from again. Bloodhounds tracked his scent from his apartment to the Whiting Ranch Wilderness Park nearby; authorities believe he went hiking there the day he disappeared. He left his credit and identity cards, cash, cell phone and vehicle behind.