Millionaire questioned over Beaumont children also investigated over alleged child-sex offences overseas

EXCLUSIVE: Andrea Nicolas 7 News

EXCLUSIVE: A South Australian multi-millionaire, who was questioned over the disappearance of the Beaumont children, is also under investigation for alleged child sex offences overseas.

The man, who cannot be named, recently returned to Adelaide, leaving behind his lavish life in Cambodia.

The man had recently returned to South Australia from Cambodia. Photo: 7 News
A previously released image of the Beaumont children. It's been 50 years since they disappeared. Photo: 7 News

RELATED: Beaumont case 50 years on

He had been living in downtown Siem Reap, a haven for backpackers.

The former scout leader was previously jailed for sexually abusing an 11-year-old boy in the Adelaide suburb of Glengowrie in 1990.

Since his release 7 News understands he had been running a lady boy bar with his Cambodian partner.

The Beaumont children, a picture of innocence before they disappeared. Photo: 7 News

He had also been renting out luxury apartments, a stones throw away from the party district.

In June the man arrived back in Adelaide.

Within weeks he found himself before major crime detectives, investigating the disappearance of Grant, Arna and Jane Beaumont in 1966.

It’s been 50 years since the children disappeared, Jane, who was nine, seven-year-old Arnna and four-year-old Grant Beaumont were reported missing on Australia Day after failing to return from a trip to Glenelg beach.

Image from archive footage of the search for the Beaumont children. Photo: 7 News

“Whether there is a link with the Beaumonts, I'm quite sure they will find out soon enough,” Stuart Mullins, the Co-Author of Satin Man, a book exposing the prime suspect in the case, told 7 News.

“They are absolutely focussed on if there was a link,” he said.

'He is a paedophile': Stuart Mullins speaking about a prime suspect in the case. Photo: 7 News.

“He is a paedophile, he did live in Glenelg at the time and he did abuse children.”

However, police claim they were yet to uncover anything to implicate the man.

Images released by SA police as the 50th anniversary approaches of the Beaumont children's disappearance. Photo: 7 News

7 News believes the man had been living in Cambodia since 2008.

It’s believed he still owns properties in Siem Reap and in Burma.

It’s also understood he financed orphanages in both countries and that Cambodian police had interviewed several children who claim to have been abused.