Grim photos have emerged of the cluttered hotel room where an Australian man allegedly strangled a Thai teenager to death.

Simon Peter Carman, 45, from Perth’s southern suburbs, remains in custody after the body of 17-year-old Tunchanok Donhomla was found inside a black suitcase near railway tracks outside Pattaya last Friday night – two days after she was last seen.

Police allege the British-born truck driver placed the teen’s naked body into the suitcase before dumping it in long grass a day earlier.

Carman was arrested at Bangkok’s Suvarnabhumi International Airport just minutes before he allegedly tried to board a Jetstar flight to Perth.

An unnamed friend of Ms Donhomla visited Carman’s dingy and cramped hotel room after reporting the teen’s disappearance to police.

Photos obtained by the ABC show the friend confronting Carman in the untidy room, where piles of clothing were strewn everywhere.

The top of the fridge was littered with cleaning products and multiple empty alcohol bottles. 

A small pink bow was seen stuck on the front door.

Simon Carman is accused of killing Tunchanok Donhomla (pictured), whose body was found inside a black suitcase near railway tracks outside Pattaya on Friday night 

Photos emerged of Simon Carman’s hotel room after the Thai teen disappeared

Carman, 45, was arrested by police in Thailand last Friday

The photos emerged as more witnesses detailed Carman’s allegedly movements in the Pattaya party district on the night he met Ms Donhomla.

Marina 2 Bar and Grill manager Kanyarat Duangdao recalled seeing an allegedly intoxicated Carman at the bar with a different girl before he left the venue alone at 1am.

Another witness told the ABC claimed they saw Carman approach Ms Thanchanok and several friends on a beachside street two hours later.

An autopsy has revealed that Ms Donhomla died from strangulation.

Her grieving family, who travelled 600km to Pattaya, have since taken her body home in Thailand’s north-east.

‘I don’t know what else to say. I just want him executed,’ her stepmother, Oradee Bussarakum, said.

Carman has been charged with murder, concealing and moving a body, and taking a minor aged between 15 and 18 for sexual purposes.

He denies the allegations and claims he acted in self-defence, alleging that Ms Donhomla attacked him with a knife during an argument over money.

Ms Donhomla’s body was found inside a black suitcase dumped near railway tracks outside Pattaya last Friday night – two days after she was last seen

Hotel footage captured Ms Donhomla with Carman shortly before she was allegedly strangled to death

In taped interviews released by police, Carman addressed Ms Donhomla’s family.

‘I feel bad for what happened to your daughter,’ he said.

‘It was out of my control.’

Carman remains in custody at Pattaya Remand Prison, where he is halfway through a mandatory 10-day quarantine period in isolation.

A date has not yet been set for his first court appearance. 

A murder conviction in Thailand can result in the death penalty or a jail sentence of between 15 and 20 years.

If convicted, Carman will likely be transferred to the maximum-security Bang Kwang Central Prison, known as the ‘Bangkok Hilton’.

The notorious jail is also dubbed by locals as ‘The Big Tiger’ because it ‘eats men alive’

More to come.