Zachary Stratton Smith RESOLVED Zachary, circa 1997 Missing Since 12/19/1997 Missing From Antioch, California Classification Family Abduction Age 9 years old Height and Weight - Distinguishing Characteristics - Details of Disappearance Zachary and his sister Chelsea were abducted by their non-custodial mother from Antioch, California on December 19, 1997. They were found safe in November 2010. They want nothing to do with their left-behind father, however. Investigating Agency - Source Information YouTube Video: A Father's Plea to Find His Missing Children Zachary and Chelsea Smith . .