When asked how he could travel for so many years in Asia, and whether he was independently wealthy, Hurst responded, "We're asking the same questions."
Police said Karr had been living in a dormitory-style guesthouse called The Blooms in a neighborhood of massage parlors and travel agents that cater to expatriate residents and sex tourists. The nine-story hotel offers rooms for as short as three-hour rentals.
The district attorney in Boulder, Mary Lacy, said the arrest followed several months of work.
She said Karr, who had traveled extensively across the world, may also be connected to a prior case in Santa Rosa County, Calif. She did not provide further details.
Sonoma County Chief Deputy District Attorney Joan Risse confirmed the child pornography charges and arrest warrant against a John Mark Karr, though she cautioned that she didn't know if he was the same person held Bangkok. State records show Karr lost his teaching credential in 2002.