The DNA of Warot Tuwichian − the son of a Koh Tao headman − did not match samples taken from the crime scene in the island murder case, test results from Police General Hospital revealed yesterday.
The DNA obtained from blood and a mouth swab taken from Mr Warot did not match the DNA found in semen recovered from British tourist Hannah Witheridge, Police spokesman Pol Lt Gen Prawut Thawornsiri said.
British tourists, Witheridge and David Miller, were found dead on Sept 15.
Mr Warot was accompanied by his father — also owner of the AC Bar where the two Britons partied the night of the murder — when he gave the DNA samples at Police Headquarters on Thursday.
Test results from three other hospitals are expected to be revealed today, Pol Lt Gen Prawut said.
Thawatchai Siangjaew, director-general of the Office of the Public Prosecution Region 8, said the DNA test was not required by prosecutors but Mr Warot agreed to take it to put an end to accusations on social media.
Mr Thawatchai said he was not aware the parents of the Myanmar suspects, Win Zaw Htun and Zaw Lin, had requested new DNA tests for their sons.
He said it was common for the parents of suspects to demand fair proceedings in a criminal case. Prosecutors will only indict the suspects if investigators submit compelling evidence, Mr Thawatchai said.
The director-general also said the parents of the British victims have yet to file a criminal or civil case against the Myanmar suspects.