Detective Chief Inspector Gary Jubelin has confirmed to the public that the case is still active. "I can assure you that we haven't given up on the investigation. I can assure you that we will not give up on the investigation."
He has also confirmed that there are still a number of suspects being added to their persons of interest list.
"The circumstances in which William disappeared lead us to believe that there was human intervention, and we are following up the investigation along those lines," he said.
"This is a dynamic investigation. A substantial amount of those persons of interest have now been reduced but because of the dynamic nature of this investigation that list of persons of interest is constantly being added to."
Police are also urging the public to submit any helpful information, but not to waste their time.
“We are not interested in sightings of children running around in a Spider-Man suit in a McDonald’s carpark," Jubelin said.
The police are only interested in genuine information. “That information might be in the form of people who have concerns about someone they know, someone with their family. The way they react when William Tyrell's name is mentioned might cause suspicion."
The one million dollar reward is still on offer for anyone who has information that leads to the recovery of William.
William went missing from his foster grandparent's home in Kendall, New South Wales.
This article originally appeared on WHO.