The body was put on a night ferry from the island on Friday night (January 23) and arrived at Surat Thani on Saturday morning (January 24). From there it was taken by a pickup truck of the Kusolsattha Surat Thani Foundation, a rescue group, to the Institute of Forensic Science at Police General Hospital in Bangkok.
The 23-year-old backpacker was found dead inside a bungalow room at the InTouch Resort on Koh Tao on Wednesday night.
Both her parents and the police believe no foul play was involved. However, the case is considered very sensitive given that the death occurred just four months after two other young Britons were found murdered on the same beach.
In some of the many Twitter messages she posted while on Koh Tao, Annesley had complained of a chest infection. She also said she was taking Tramadol, a powerful painkiller, while drinking.
Chokechai Sutthimek, superintendent of Koh Tao police station, said on Saturday that medications found on the bed of the deceased were sent for tests in Bangkok.
Annesley had locked herself in her room on Tuesday night and police found no traces of evidence suggesting a struggle, said Pol Lt Col Chokechai. None of her belongings had been stolen, he added.
When Annesley did not come to check out as scheduled on Wednesday, a resort employee decided to check the room and discovered her body, the officer said.
Pol Maj Gen Pornchai Sutheerakune, head of the Institute of Forensic Medicine, told FM100.5 that the autopsy would be carried out today. Forensic police experts would not jump to a conclusion that the death was due to an overdose, he added.
Annesley's death comes just four months after two other young British backpackers — Heather Witheridge, 22, and David Miller, 23 — were killed on the same beach.
Two migrant workers from Myanmar — Wai Phyo and Zaw Lin, both 21 — are being tried for their murders. They maintain they are innocent and only confessed after being beaten by police. Witness testimony is scheduled to begin on July 8 and the trial is expected to last three months.
The police handling of the September murder investigation was widely criticised, and officers investigating the Annesley case were told to be extremely careful and follow proper procedures.
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