'You're no longer of use to our family alive': Levesons on Michael Atkins

NSW Police are confident the human remains found south of Sydney are of missing man Matthew Leveson.

Police have scoured Royal Nation Park near Waterfall following information from Mr Leveson’s former partner Michael Atkins who was acquitted of his murder.

In an emotional statement Mr Leveson's parents Faye and Mark Leveson thanked officers for their efforts and called for the law to change.

Mr Leveson said: "If any of the jurors of Matthew's trial see this: what were you thinking?

"Look at what you've done to us, you could have solved this many years ago yourselves."

"And lastly, Michael Atkins to you: you are no longer of any use to our family alive."

Detective Chief Inspector Gary Jubelin said police are yet to officially confirm that the remains belong to Mr Leveson, but his parents are hoping their family can finally find peace.

“I can’t say that with 100 per cent confidence until we get the forensic investigations carried out, but the circumstances in which we found these remains lead us to believe they are Matthew Leveson’s," he said.

“The loss of a loved one is never easy to deal with, but the grief can be even harder to overcome when you can’t lay them to rest.

“We hope the Levesons will soon be able to properly – and respectfully – say goodbye to Matthew."

But Mrs Leveson said the family “had to fight” nine and half years to bring their son home.

She said the justice system is flawed and needs to change.

"Our laws have got to change, our victims have got to have a voice,” she said.

“That person – Atkins, he could have finished this nine and a half years ago.

“But he didn’t he chose to hide in Queensland and let our family suffer.

“He never came down, he never came to watch us dig, to watch every single day that scoop of dirt if Matty was going to be under that.

“He had his rights to stay up there and hide and we had to come down every single day and watch.”

Mr Leveson thanked the police for their "extensive efforts" after 20 days of searching.

"Eight days in November, four days at the other crime scene in January and again eight days here," he said.

Police will now carry out forensic investigations to confirm if the bones belonged to Leveson.

His 2007 disappearance is currently subject to a Coronial Inquiry, which is due to resume in August.