Martinez was last seen in Sacramento, California on July 16, 2006. He has never been heard from again. He is believed to have been abducted by his non-custodial mother, Junko Fukushi. Photographs and most vital statistics for Fukushi are unavailable. Her date of birth is October 17, 1980; she was twenty-five years old in July 2006.

Fukushi may have taken Martinez to Japan. The child's whereabouts are unknown and his case remains unsolved.