The San Francisco sighting was what they believe is an en route to a location that is very important to this group Amy is with. 'FindAmy' also believes Amy's captors are in fact American and there are many Americans involved in this association. She/He also said there are places Amy could show up in the US, and their locations aren't just limited to the Southern Caribbean. Also about the location where the encounter took place, i guess crowded areas is where "travelers" would be common... I guess they may have been goingfor the ''tourist'' look with their Hawaiian shirts, cheap sunglasses, Amy's jacket ect. And also in public , i guess ''exchanges'' are easy. Also Amy was allegedly chosen for her everyday, American girl ''profile'' she looks just like anyone else, she is not that striking. FindAmy also expressed Amy is not taken in public unless she is packed. So if Amy is seen out and about it's probably a pretty good guess that a business transaction is taking place. Even though her handlers appear to be quite dumb, they aren't THAT stupid to bring Amy just everywhere.
However anyway the San Francisco sighting is one of the most heavily documented and verified sightings. The FBI had dropped the ball a number of times in the Caribbean, but they really worked hard on the San Francisco sighting. FBI agents were sent from Washington, DC. The very best FBI sketch artists were sent from Quantico, Virginia. The sketches are so good they are almost like pictures apparently. According to one witness, she spent eight hours just with the sketch artist.