Autopsy reveals cause of death of Thai teenager, 17, allegedly killed by Aussie - as cops claim his DNA was found on her body

By KYLIE STEVENS, SENIOR BREAKING NEWS REPORTER, AUSTRALIA Published: 23:13, 18 August 2026 | Updated: 23:28, 18 August 2026 Thai authorities have revealed harrowing new details of how a teenage girl was allegedly killed by an Aussie. Simon Peter Carman, 45, from Perth's southern suburbs, could face the death penalty over the alleged murder of 17-year-old Tunchanok Donhomla, also known as Cake. Her body was found dumped inside a black suitcase near railway tracks outside Pattaya on June 26, two days after she was last seen alive on CCTV with Carman in the complex foyer of his condo. Carman was arrested at Bangkok's Suvarnabhumi International Airport just minutes before he tried to board a Jetstar flight to Perth.  As police prepare to wrap up their investigation, an autopsy has found that their teen 'had a brain injury and she suffocated'. 'She had no other injuries,' Colonel Anek Srathongyoo from Pattaya City Police told the ABC. 'We also collected Simon (Carman's) DNA and matched it to DNA found on Cake's body.' He added that police had compiled '100 per cent of the evidence' in the case and expect a sentence to be handed down 'quickly'. The body of Tunchanok Donhomla, also known as Cake, was found dumped inside a black suitcase near railway tracks outside Pattaya on June 26. Carman was arrested at Bangkok's Suvarnabhumi International Airport just minutes before he tried to board a Jetstar flight to Perth Police hope to conclude their investigation this week and hand the case over to prosecutors, who have until September 18 to indict Carman. Thongchai Donhomla was 'relieved' to learn of an update about his daughter's death. 'I don't have the legal knowledge or the money to pursue all these proceedings myself, so I have to rely on the media,' he said. 'I don't ask for much. I just hope my child gets the justice she deserves Carman has been charged with murder, concealing and moving a body, and taking a minor aged between 15 and 18 for sexual purposes. He claims he acted in self defence, alleging that the teen attacked him with a knife during an argument over money. He is currently being held at Pattaya Remand Prison. A murder conviction in Thailand can result in the death penalty or a jail sentence of 15 to 20 years. Sorry we are not currently accepting comments on this article.