The press corps had begun to fade away when Karr, in a surprise, sent word that he wanted to speak directly to the media, and he was hustled back into the room.
Creepy bloke, but did he do it?
John Mark Karr, 41, lived on the ninth floor of a rundown apartment building in a Bangkok district full of similarly rundown buildings and guest houses. For Karr, it was an inexpensive place to reside; apartments in his building rent for as little as $160 a month. Other residents describe him as a dour loner who didn't let anyone into his peripatetic life, traveling in and out of Thailand. An Internet café clerk in Karr's building said he was a regular customer who kept a close eye on users in neighboring booths, as if he was afraid they were spying on him. "He never wanted to chat," said Nii, the clerk. "Actually I was afraid of talking to him. He always seemed to be a bad mood. He rushed in, then rushed out."
More here: http://www.time.com/time/nation/article/0,8599,1228182,00.html
I've stayed in Bangkok three for periods of time and one can be completely anonymous, should one so choose.