Unexplained Deaths in Thailand

On Jan.11, Mariam Soraya Vorster, a 33-year-old American tour guide working in the northern Thai city of Chiang Mai, became sick with what was thought to be food poisoning and died.

Vorster's death would be the first of five in Chiang Mai in just six weeks, four alone in a hotel called the Down Town Inn. Two more women staying in the same hotel became se…