'Net cast wide' in hunt for killers of UK tourists
Thai police are expanding DNA testing on the island where two British tourists were murdered last week.
Hannah Witheridge, 23, and David Miller, 24, were found dead on Koh Tao on 15 September.
Police say they want to test every male on Koh Tao, including fishermen and boat drivers who may have visited the island at the time of the killings.
The BBC's Jonathan Head police were now "casting their net very wide indeed".
22 Sep 2014
- From the section Asia