Anyone who wanted to travel and explore new places have to do their homework first upfront. Going to a remote unknow place with a stranger is asking for truble. Did she check the tour guide license before engaging him. Further in Koh Chang the remote areas lack electricity and phone coverage also.
Looks like this incident is becoming a regular occurence. It is time the authorities have to do something seriously. Just ignore if the person is in sound knolwege of mentaly retarded. All these claims are only as excuse. Just hang them upside down and whack them in their buttock till it bleeds. Once done all their mental issues would be permanently cured.