Seven years after Australia first learnt of the missing boy in the spiderman suit, police have launched a new search for three-year-old William Tyrrell.
On Monday, NSW Police announced they were conducting a new "high intensity" search for William's remains near his foster grandmother's home in Kendall, where the little boy disappeared from on the morning of September 12, 2014.
Speaking to 2GB on Tuesday, NSW Police Commissioner Mick Fuller said "we've never given up on finding what happened to William Tyrrell... it's not a cold case, it's been an active investigation.
"The team is working diligently searching today, and we are hopeful we will find some forensic evidence to assist with this case."
He also confirmed there has been a significant breakthrough in the case and he was confident police would solve the mystery of the boy's fate.
"There is certainly one person in particular that we are looking closely at," he confirmed.
Hundreds of officers have descended on three new areas around the town and are being helped in the search by 30 SES volunteers.
Volunteers are using chainsaws and other heavy-duty equipment to clear dense bushland, including felling large trees.
As new details in the case come to light, here's everything we know about the search for William Tyrrell.
Police have seized a car in Sydney.
On Wednesday, police confirmed they have seized a car from a home in Gymea, 390km from where William disappeared in Kendall.
The grey Mazda was taken from the south Sydney home under a Coronial Order last Tuesday.
Police said the car was taken to a secure facility for forensic examination which was expected to take several weeks.
"This activity relates to inquiries and search operations currently being conducted in the Kendall area," police said in a statement.