Police 'hopeful' the case of missing boy William Tyrrell can be concluded in 'two to three weeks.'

Missing boy William Tyrrell in his Spider-Man costume that he was wearing when he disappeared.
Missing boy William Tyrrell in his Spider-Man costume that he was wearing when he disappeared. Photo credit: Image - AAP

Police are "hopeful" the search for missing Australian boy William Tyrrell can be concluded seven years after he went missing. 

Tyrrell was three-years-old when he disappeared from his foster grandmother's house in Kendall, New South Wales on September 12, 2014.

The three-year-old was wearing a Spider-Man costume and playing with his 5-year-old sister in the yard when he suddenly disappeared. 

State Crime Command director Detective Chief Superintendent Darren Bennett said on Monday the search will take two to three weeks which would involve checking "new locations" and a "different type of search method".

"This activity is in response to evidence we have obtained in the course of the investigation, not speculative in any way, we are acting on behalf of the coroner and in conjunction with the colonial orders, she will be kept updated with regard to our progress," Bennett says. 

"There is a large amount of work to be undertaken, we will be working specialist areas and people from outside the police force. 

"We are very hopeful we can bring this matter to some sort of conclusion."

Bennett believes any hope of finding Tyrrell is alive is very slim saying investigators would "highly likely" be looking for a body. 

"It's highly likely that we, if we found something it would be a body," he says. "We are looking for the remains of William Tyrrell, no doubt about that."

It was also revealed on Monday that the police have sought an apprehended violence order against his foster parents.

The application had been placed on behalf of someone who cannot be identified for legal reasons, with the matter to be heard in court next week according to 7News. 

William’s foster parents, who have never been ruled out as persons of interest, also can’t be identified.

NSW Police Commissioner Mick Fuller says they have been "working tirelessly" to get a significant breakthrough in the case. 

“There is certainly one person in particular that we are looking closely at,” he told Sydney radio 2GB on Tuesday.

“I certainly don’t want to declare too much because again in these cases you do not want to compromise a potential outcome.

“Officers have been working tirelessly to get to this point where we are searching land, again using the best technology available.”

NSW Police Minister David Elliott said “100 police supported by 30 RFS volunteers” will conduct a major search at the small country town in NSW over the next “two to three weeks.”

They hope to finally answer the question of what happened to the little boy.

“What they’ll be looking for is any disturbance to the ground, particularly if there is any evidence of the top soil being moved,” he explained. 

“What we’re seeing now is I hope the conclusion of seven years worth of work.”

A $1 million reward is still on the table for finding the missing child.