From the Yahoo article:
"Howson arrived in Thailand on Jan. 5, and police said they started to trace her on Jan. 12 at the FBI’s request, finding her on Jan. 14 in the western province of Ratchaburi, where they suggested she turn herself in."
“We did not arrest her. After she knew the facts, she showed the intention to accept the punishment in the U.S.,” he said. “This will be a good example for Thai society.”
Amazing how they can spin this as a 'good example'?