Investigation continues on Thai island after tourist murders Thailand's military ruler on Wednesday questioned whether tourists in bikinis are safe in the kingdom, in comments following the murder of two Britons whose battered bodies were found on a Thai island. David Miller, 24, and Hannah Witheridge, 23, were found dead on the southern island of Koh Tao on Monday, sparking a hunt for their killers. IMAGES of the hotel and police investigations on Koh Tao island.