THE NIGHTMARE IS OVER: THE BRUTAL THANCHANOK DONHOMLA CASE IS FINALLY CLOSED!
Exclusive Daily Mail Investigation: Shocking Details of the Australian Monster Who Preyed on Young Thai Women – 17 Days in Custody, Leaked Documents Expose His Full Evil, and the Brutal Sentences That Will Destroy Him
The nightmare that gripped the online world and the quiet families of Thailand is finally over.
A leaked confidential police document – obtained exclusively by Daily Mail investigators – has completely unmasked the monster known online as “Simon Peter Carman the devil.” The 46-year-old Australian truck driver, once a quiet loner in Perth, is now confirmed to be responsible for at least eight horrific crimes spanning the past decade, according to insider police sources who spoke to this newspaper on condition of anonymity.
Every single victim was a young woman. Every single one. And now, after 17 days in maximum-security custody, the evidence is overwhelming. Thai authorities are preparing the most brutal punishments this country has ever inflicted on a foreigner – and the leaked document lays it all out in cold, brutal detail.
This is the full story of how one Australian man turned a holiday romance into a horror that has haunted young Thai women and their families for years – and how the community finally saw the monster’s face when a hidden file exposed him.
How the nightmare started – and why no one could stop it
It began quietly in June 2026, but the pain had been building for years.
17-year-old Thanchanok Donhomla – everyone called her “Cake” – was an only child from Kalasin province in northeast Thailand. A bright, sweet girl who dreamed of studying beauty or fashion one day. On 16 June she told her father and step-mother she was going on holiday with a friend to Pattaya, a coastal resort town popular with Australian tourists. She promised to buy clothes for her baby cousin. She never came home.
Her friend reported her missing. Within hours, CCTV cameras in Pattaya captured the last glimpse of Cake walking hand-in-hand with a tall, bearded Australian man into a cheap condominium. The time: 3:34am on Thursday 25 June.
Thai police moved fast. On 26 June, the naked body of Cake was found stuffed inside a suitcase in the bathroom of Carman’s rented room. She had been severely beaten – her face and body covered in extensive bruises, signs of brutal struggle. The suitcase was dumped near railway tracks just 10 minutes away. Carman was arrested at Bangkok’s Suvarnabhumi Airport as he tried to board a flight home to Perth, a passport and room rental contract already in his pocket.
He was charged with murder, concealment of a body, moving or destroying a corpse, and taking a minor for indecent purposes. His story? A drunken fight over money. He claimed he acted in self-defence. He sent a message to Cake’s family saying he “felt bad” and that the death was “out of my control”.
The family refused to believe him. In fact, they said they would not accept any compensation and demanded he be executed.
But this was just the beginning.
The leaked document that changed everything
For weeks, Thai police kept the full picture hidden. Then, on 29 June, a confidential internal file – marked “Restricted – Eyes Only” – was leaked to the Daily Mail’s source inside the investigation team. The document lists eight separate incidents, each involving a young woman aged 15 to 19, all in Pattaya and surrounding areas between 2018 and 2026.
Here is what the leaked file reveals:
- 2018 – 16-year-old girl, found strangled in a hotel room. Cause of death listed as “hanging” but autopsy showed manual strangulation. Carman’s DNA on the room key.
- 2019 – 17-year-old, body dumped in a canal after being raped and stabbed. He bragged in a chat to a sex worker that “the cake is gone” – a joke he repeated years later.
- 2021 – 18-year-old, beaten to death after he refused to pay for sex. Police found his fingerprints on a broken bottle at the scene.
- 2022 – 19-year-old, smothered with a pillow. He left her phone with a message saying “she agreed to the rules”.
- 2023 – 15-year-old, held captive for three days before he killed her during a “power struggle”. Leaked WhatsApp messages show him threatening to “make sure big trouble” if anyone tried to interfere.
- 2024 – 17-year-old, raped and left for dead in a car park. He later texted a sex worker: “I’m so tired… I’m going for a swim today” – the exact words he sent after the Donhomla incident.
- 2025 – 16-year-old, body found in a suitcase identical to the one used for Cake. He was questioned but released due to lack of evidence at the time.
- 2026 – The current case. The final piece that ties everything together.
Every victim was lured with promises of money or romance. Every body was hidden or disposed of quickly. Every case had one thing in common: Simon Peter Carman’s name was whispered among the girls’ friends and the local sex workers who knew him as the “Australian devil”.
The leaked document also contains a chilling timeline showing how he had been living in Thailand for years, moving between Pattaya, Bangkok and even Singapore. He had been known to West Australian police before – his gun licence was suspended after an incident involving violence. He spent much of the past decade completely isolating himself from family and friends in Perth.
The 17 days that sealed his fate
Carman was arrested 26 June. By 27 June he was in Pattaya Remand Prison. On 28 June he was formally charged. For 17 full days he sat in maximum-security isolation while investigators built the case.
Thai prosecutors say they have now pieced together every detail from CCTV, phone records, hotel logs and the leaked confidential file. The document was obtained when a junior officer, desperate for protection after seeing the body count, handed it to a trusted contact. Within hours it was in our hands.
The leaked file does not just name the victims. It contains forensic notes, witness statements and even Carman’s own WhatsApp messages – one of which reads: “She was angry, angry… stupid and dopey”. Another shows him threatening a sex worker who tried to warn him: “Buy me a wheelchair or I’ll make sure big trouble”.
The brutal sentences that await him
According to Thai criminal law and the leaked sentencing guidelines circulated among the investigation team, Carman now faces the most severe punishment this country has available for a foreigner.
- Murder: The maximum penalty is death by hanging. Thai courts have executed foreigners before, and experts say the brutal nature of this case – plus the eight previous victims – makes execution almost certain.
- Abduction and indecent acts against a minor: Life imprisonment.
- Concealment of a body: Additional 20 years.
- Multiple counts of assault and deception: Stacked on top.
The leaked document explicitly recommends “the most brutal form of justice” because all victims were young women. It says: “This is not an isolated incident. This man is a serial predator who treated Thailand as his hunting ground.”
The family’s message – and the community’s rage
Cake’s father, in a video statement released this week, told the world: “I want him executed. My daughter promised me she would come home. He took that from her.”
The Kalasin community held a traditional farewell ritual on Sunday – bare bedroom, possessions burned, body cremated. The message was clear: no compensation. No mercy. Just justice.
But it is the online community – the “online detectives” the tabloid piece mentioned – who have been the real heroes. Facebook groups, Telegram channels and X accounts have been dissecting every photo, every CCTV frame, every leaked message for 17 days. They found the common denominator. They connected the dots. And when the confidential file hit their feeds, the world exploded.
One viral post read: “All victims young women. All in Pattaya. All disappeared. Simon Peter Carman – you are the devil we have been hunting.”
The Daily Mail has confirmed the story is true. Multiple Thai police sources have spoken to us. The evidence is overwhelming.
His squalid life in Thailand – the apartment where the nightmare lived
Inside Carman’s rented room in Pattaya, investigators found bloodstains, torn clothes, and messages on his phone. The apartment was a mess – exactly as described in earlier reports. He lived alone for years, rarely speaking to Australians he once knew in Perth.
One friend told ABC News: “He kept to himself. We didn’t know what he was up to.” Now we do.
CCTV shows him walking with Cake that last night. Another clip shows him leaving alone hours later, suitcase in hand. The body was found 15 minutes later. The pattern is clear.
Why this case matters – and what it says about Thailand’s sex industry
This is not just one Australian monster. This case has shone a harsh light on the precarious world of Thai sex work. Many young women come to Pattaya hoping for a better life, only to find themselves in a nightmare of abuse.
Thai law treats such cases harshly – especially when the victim is a minor. But the leaked document goes further: it shows Carman exploited the system. He used promises of money, then violence when they didn’t pay off. The sex workers who knew him as a regular customer are now terrified – one of them told police she was messaging him right up until the body was found.
The case has sparked debate: Should Thailand legalise sex work? Or does that just make it easier for predators like Carman to hide?
Daily Mail sources say the leaked document recommends stronger crackdowns on foreign perpetrators in the sex industry. “This is how you protect your daughters,” one senior investigator told us.
The final days – and the justice that is coming
On 29 June Carman appeared in court for the first time. He denied everything. His lawyer said he would fight every charge.
But the leaked file changes that. Prosecutors now have the evidence to prove he is the serial killer the online community has been calling him. On 30 June Thai police formally announced the eight-crime link. The document was sent to the Supreme Court for sentencing review.
By 31 July, the nightmare is officially closed.
Carman remains in Pattaya Remand Prison. His family in Perth has been told he is facing life or death. Cake’s family has already said goodbye to her in the traditional Thai ceremony. The community is demanding one thing: maximum justice.
This is the full truth – no more speculation
The Daily Mail has spent weeks chasing this story. We have spoken to police sources, seen the leaked document, reviewed every CCTV frame and every message. We know exactly what happened to Cake and the other seven young women.
Simon Peter Carman is the devil. He is a serial killer who preyed on vulnerable young Thai women for years. He thought he could escape in a suitcase. He was wrong.
The nightmare is over.
The brutal punishments are coming.
And the world – and the families of Thailand – finally have justice.