Authorities said the Australian national is being questioned on suspicion of murder, concealing a body and taking a minor for an indecent purpose.
Despite reports circulating on social media, police have stated that the suspect denies killing the teenager. The investigation remains ongoing, and officials are continuing to gather forensic evidence and witness statements before the case proceeds through Thailand’s legal system.
Under Thai law, he remains a suspect until the court determines his guilt or innocence.
Case Sparks Public Anger
The case has drawn widespread attention across Thailand, with many expressing shock over the teenager’s death.
The incident has also renewed discussion about crimes involving foreign nationals. It comes only weeks after Thai authorities reduced the length of visa-free stays for many visitors as part of wider efforts to tackle offences involving some foreign tourists, including alleged drug crimes, trafficking and illegal business activities.
🚨‼️An #Australian man, 46-year-old Simon Peter Carman has been arrested in connection with the murder of a 17-year-old #Thailand girl (nicknamed “Cake”). The victim, identified as Thanchanok Donhomlao (nicknamed “Nong Cake”), was found dead inside a suitcase near railway tracks… pic.twitter.com/tWdj1ekYO4
— African champion 🏆 (@membunnamdi1) June 27, 2026
Australia’s Department of Foreign Affairs and Trade confirmed that it is providing consular assistance to the detained Australian citizen but said it could not comment further because of privacy obligations.
Thai police said the investigation is continuing, with further forensic examinations and witness interviews expected before prosecutors decide on the next legal steps.