The father of the British man murdered in Thailand believes his son had stepped in to help his fellow victim when they were both brutally killed on an island.
Ian Miller said it was in his 24-year-old son David's character to help, and claimed that was probably the circumstance when he and Hannah Witheridge were murdered in Koh Tao a week ago.
He told the Daily Mail: "It has become clearer and clearer that it is quite likely David was stepping in to help a girl who was in trouble.
"That would be absolutely in his character."
The body of a holidaymaker from Norfolk who was brutally murdered together with a fellow tourist in Thailand has returned to the UK, her family said.
Hannah Witheridge, 23, was found with severe head wounds next to David Miller, 24, on a beach on the island of Koh Tao on Monday.
Her family said today (Sunday) that they had travelled to Bangkok on Tuesday to bring their "beloved Hannah" home and find out more about the investigation.
Meanwhile, police in Thailand said they are investigating new evidence suggesting that the murders may have been due to "sexual jealousy".
A spokesman for the Royal Thai Police said that the force was also looking into claims that the pair had a row with a Thai man in a bar before they were killed.
Post-mortem examinations revealed that Ms Witheridge, from Great Yarmouth, Norfolk, died from head wounds while Mr Miller, from Jersey, was killed by severe blows to the head and drowning.
Police in Thailand said they still have not "come up with the exact number of the suspects" following the brutal murders of two British tourists, but confirmed they are looking for more than one.
Six days after the bodies of Hannah Witheridge, 23, and David Miller, 24, were found with severe head wounds on a beach on the island of Koh Tao.
A spokesman for Royal Thai Police would not confirm that DNA from Miss Witheridge's body reportedly matched that of two Asian men.
Police in Thailand have admitted the investigation into the brutal murders of two British tourists, including Hannah Witheridge from Great Yarmouth, is proving "quite difficult" as they revealed they do not know how many people were involved in the killings.
Five days after the bodies of Hannah Witheridge, 23, and David Miller, 24, were found with severe head wounds on a beach on the island of Koh Tao, a spokesman for Royal Thai Police insisted officers are "working around the clock to find the culprits" amid fears the investigation has stalled.
Post-mortem examinations revealed Miss Witheridge, from Great Yarmouth, Norfolk, died from head wounds while Mr Miller, from Jersey, died from severe blows to the head and drowning. A bloodstained garden hoe, believed to be the murder weapon, was found nearby.
Police Colonel Kissana admitted it was "difficult to say" if the killers were still on Koh Tao and police were unable to confirm if there was more than one murder weapon.
Police Colonel Kissana also said 150 officers had been deployed on the island and senior police officials had met Miss Witheridge's "deeply distressed" family.
The family of Miss Witheridge arrived in Thailand yesterday and had an emotional meeting with Thailand's deputy police chief, in which they were given updates on the investigation into her death.
The bodies of the two young Britons have been moved from a forensic hospital in Bangkok and arrangements are being made by the Thai foreign ministry for them to be repatriated, according to reports.
The family of a woman from Norfolk killed in Thailand at the weekend have arrived in the country.
Hannah Witheridge who was 23 and from Hemsby near Great Yarmouth was murdered along with another British tourist.
The Thai police force is facing growing criticism for the way it's handling the double murder.
Watch Kate Prout's report here.
Thailand's Prime Minster has apologised for suggesting that foreign visitors to its world-famous beaches might be unsafe wearing bikinis as the family of a tourist from Great Yarmouth who was brutally murdered at a Thai resort arrived in the country.
Relatives of Hannah Witheridge, whose body was found on a beach alongside fellow British victim David Miller, hugged each other as they prepared to meet Royal Thai Police at their headquarters in Bangkok.
Miss Witheridge, 23, and 24-year-old Mr Miller were found with severe head wounds on the island of Koh Tao on Monday.
In the face of mounting criticism, military ruler Gen Prayuth Chan-ocha said: "I apologise that I have spoken too harshly ... I didn't mean to criticise or look down on anyone. I can guarantee that Thailand is still safe ... I wanted to warn (the tourists) to be careful."
Earlier this week he had claimed that foreigners visiting the Southeast Asian country think "they can do whatever they want, wear bikinis wherever they like ... (but) will they be safe?"
His comments came as the investigation into the murders appears to have stalled with police having no suspects.
DNA discovered on the body of Miss Witheridge has been found not to match British brothers Christopher and James Ware, who had been speaking with officers.
And migrants, who had been questioned after bloodstains were found on some of their clothes, are no longer suspects after detectives revealed no matches were found between them and two sets of DNA found on Miss Witheridge's body and on a cigarette butt discovered near the scene of the murders.
Royal Thai Police had insisted they had found "strong evidence" in connection with the deaths.
A bloodstained garden hoe, believed to be the murder weapon, was found nearby.
More than 70 Thai police have been questioning migrant workers and tourists on the island, visiting hotels, bars, homes and businesses as they search for the killer.
Relatives of Hannah Witheridge, the young woman found murdered in Thailand, have arrived in the country to meet police.
Some of Hannah's family hugged each other as they prepared to meet Royal Thai Police at their headquarters in Bangkok.
Miss Witheridge, 23, and 24-year-old David Miller from Jersey were found with severe head wounds on the island of Koh Tao on Monday.
Tests carried out on a group of Burmese migrants questioned over the deaths have shown no DNA matches, police said.
DNA discovered on the body of Miss Witheridge has also been found not to match British brothers Christopher and James Ware, who spoke to officers.
Tests carried out on eleven Burmese migrants questioned over the murders of British backpackers David Miller and Hannah Witheridge have shown no DNA matches, Thai Police have said.
The group were arrested after bloodstains were found on some of their clothing.
As the hunt for answers over murder of a 23 year old Norfolk girl continues in Thailand friends back home in Great Yarmouth have paid their own personal tributes to the girl who had everything to live for.
At the University of East Anglia where Hannah Witheridge had studied the flag flew at half mast today.
While Hannah was studying she would train with her horse Halle at Easton and Otley College.
Equestrian Centre Manager, Hilary Francois said she was just one of those 'unique people'.
The University of East Anglia has lowered its flag today as mark of respect for a former student who was killed in Thailand.
Hannah Witheridge from Hemsby near Great Yarmouth was found on a beach on Monday morning on the island of Koh Tao - alongside 24-year-old David Miller from Jersey.
Today, the UEA's flag was at half-mast. Hannah graduated from the UEA in 2012. Two British men are now being questioned in relation to the murders.