As to how LE tracked KA to Santa Teresa, in the US Marshals press conf they do say they know KA boarded a bus at San Jose airport and went to a “known location” on that bus. He also says she did not move around much while in CR. Since the Daily Mail story indicates she first appeared at Don Jon Hostel on June 8, which was 3 weeks after she flew into CR, there must have been at least one place she stayed before Don Jon’s.
It’s around minute 12 in this video
Also in this video it seems clear the person whose passport she used was NOT the same person who dropped her off at Newark airport on May 18. The language used indicates the person who dropped her off was a “confidential informant” who cooperated with LE.
The description of how the passport info was obtained sounds like that individual did not voluntarily cooperate and there was a search warrant involved. IMO
US marshal also says as of early this week, they were a month behind on tracking KA’s whereabouts.