New footage has revealed the moment a 17-year-old Thai girl was picked up by an Australian man now charged with her murder.The video of Thunchanok Donhomla walking hand-in-hand with 46-year-old Simon Carman, in Pattaya, was filmed by a friend shortly before she vanished.The friend later handed the footage to police after reporting Ms Donhomla missing, helping investigators piece together her final movements.Mr Carman has been charged with murder, disposing and moving a body and procuring a minor for sex.He denies the charges.Thai police say he told investigators during an interview that he did not intend to hurt the teenager.Police suspect the cause of death was strangulation, with officers saying there were no other significant bruises found on the teenager’s body.They found Ms Donhomla’s body in a black suitcase dumped by a railway line about 15 minutes from Mr Carman’s apartment block.Thai police found Ms Donhomla’s body in a black suitcase dumped by a railway line near Mr Carman’s apartment block 15 minutes after he was arrested.Forensic specialists are examining skin recovered from beneath Ms Donhomla’s fingernails as part of the investigation.Asked about scratches on his neck by police Mr Carman allegedly said they were from a spider.An autopsy was expected to be carried out this week, although police say the final results have not yet been returned.Police Colonel Anek Srathongyoo said he ordered an immediate investigation after receiving the missing person report.The footage provided by Ms Donhomla’s friend proved instrumental, allowing officers to trace Mr Carman through CCTV footage across Pattaya.Police then contacted Thai immigration authorities, who stopped Mr Carman before he was able to board a flight to Perth.Police alleged he killed Ms Donhomla last week after picking her up for sex on the street near Jomtien Beach.Carman is believed to have been living in the Jomtien Condominium apartment blocks in Pattaya, where he reportedly paid $100 a week in rent.Sources told the Herald Sun that Mr Carman had been working as a handyman and picking up “odd” jobs around the apartment complex.“The young girl did have an ID card that said she was 22, all of the girls here have ID cards that say they are older, because if they’re underage, you’re in trouble,” a source told the outlet.“We used to call him simple, like ‘Simple Simon’ because he was a bit slow.“He had quite a few run-ins with people. He was six foot one, he was a big guy, just look at the size of him compared with that young girl.”Rooms in the Jomtien Condominiums rent out for $100 a week, or $400 a month, before water and electricity charges of around $60 a month.According to the complex, it boasts “nice facilities” of two swimming pools, two fitness centres, a table tennis room, free bike hire, a wheelchair service, CCTV and a 24-hour security service.“The condo is only 100 metres from the beach, easy transportation, clean, safe, quiet and convenient,” they wrote online.Mr Carman was born in Ballarat in Victoria before moving to Jerramungup, a small agricultural town about 450 kilometres southeast of Perth, according to The West Australian.He briefly worked in the agricultural sector, where he operated as a sole trader.“He worked on a farm when he was younger,” a neighbour told news.com.au.He later moved to Albany with his family before settling down in Rockingham, where he reportedly worked as a mechanic and truck driver.For around a decade leading up to his departure for Thailand, he had been living on and off in a unit inside an industrial estate in Rockingham.He reportedly lived off a disability pension and workers’ compensation payments linked to injuries he suffered as a truck driver.Those who knew Mr Carman described him as a medicine-riddled loner who was prone to aggressive outbursts.“He lived like a pig,” one neighbour told The Australian.“He was on a lot of meds, so when you spoke to him he was always as dopey as f**k.”Another resident of the complex said he often drove Mr Carman to medical appointments at a nearby hospital.His wife and daughter, however, found him “creepy” and told him not to have any more contact with them.Mr Carman had reportedly once shown him his collection of guns – a .22 calibre Hornet rifle and a shotgun – which he said were stored in a box along with ammunition, in a breach of gun storage laws.Police took Mr Carman’s guns from him around a year before he left for Thailand. His driver’s licence was also revoked around the same time.“It was scary when he had guns,” one man told The Australian.“He had lots of guns and all that, and I was a bit concerned in case he snapped. It was good that the police took them off him.”The investigation is ongoing.