tapes and about a week before they vanished on january 27, someone did an internet search for passport requirements for adults and children entering mexico. but why would the mcstays unexpectedly leave the country? family members now think the mystery might be solved closer to home. joseph's mother, susan blake, and his brother, michael, join us, along with the investigator in this case, detective troy. now, detective, can you tell us what the latest is in this case? >> i got some credit card receipts from ross department stores in the local area that indicate that somebody used the mcstay credit card at a ross store in vista. >> judge: what was purchased? >> there was two beach bags, four infant sleepers, terry cloth sleepers, and a jacket. inexpensive jacket.