“There is a chapter that has been closed on Castalloy site, however it continues,” Pangallo said.

“What it has generated is enormous interest in this incredible cold case, more information has now come forward that we now need to sift through.”

The forensic team believe they found the spot where two men say they dug a deep hole for suspect Harry Phipps days after Jane, Arnna and Grant went missing in 1966.

But they now believe the soil was removed at least 10 years later.

“The area was filled with landfill that is dated between 1970’s and 1990’s,” forensic archaeologist Maciej Henneberg, said.

The team are vowing to investigate where that soil was taken and follow up on a mountain of leads received since the search started.

“A lot of crimes are solved when the public comes forward with new information,” Pangallo said.

“There has been some significant information that has been passed on to me from extremely credible people.”

The large block of land that was the factory site will now be sold to developers and its hoped this dig will finally put an end to theory that the Beaumont children are buried there.

As this chapter closes, others are opening.

Another private search team has shown interest in a Stansbury site on Yorke Peninsula, which has been ruled out by detectives.