If only we knew what the investigating team do know.
Detective Chief Inspector Gary Jubelin said the purpose is now on gathering definitive evidence that William met with foul play which can be presented to either a criminal or coroner's court.
"Based on the original search and from our investigation its reasonable to draw conclusion that William's disappearance was result of human intervention and not misadventure," said Detective Jubelin.
"[But] I don't want this interpreted that the investigation is coming to an end," Detective Jubelin said. "We are very mindful that it's over 3.5 years since William disappeared and we haven't solved this matter.
"We are going to continue on until we do."
Until police know conclusively that William is not alive
they will act with the possibility that he is, but Detective Jubelin said "we have grave, grave fears"
.
Toy found in bush, police prepare for day two of William Tyrrell search