Scotland Yard is assisting with an investigation into the brutal rape of a British couple while on holiday in Thailand after they fled the country taking evidence with them. 

The couple, one a government employee, the other a businessman, fled the holiday island of Koh Chang after they were subjected to a night of terror in which they were drugged and rapped by a group, including French men and an English women. 

The pair took the stained bed clothes back to Britain, saying  the Thai police did not properly investigate. The Thai police did not take DNA evidence. The woman said the Thai police did not believe us. 

In England, the doctors tests showed the victims had  symptoms of being given a dose of Dormicon, a drug used in the United States to relax prisoners on death row before execution.