No one has been ruled out in William Tyrrell investigation, inquest hears

The man in charge of the William Tyrrell investigation says no one has been eliminated as being involved in the three-year-old's disappearance.

"We haven't closed a door on anybody," Detective Chief Inspector David Laidlaw told the inquest.

"There could still be info out there that they could be involved."

READ MORE: William Tyrrell inquest told child's scream was heard the day after disappearance

That includes elderly neighbour Paul Savage, convicted sex offender Frank Abbott and even those closest to William.

Giving evidence for the first time today, the lead investigator revealed he was one of only five investigators still on Strike Force Roseanne, down from 26 at its height.

He said while that was "sufficient", he would also welcome more resources.

"I agree with you that it is unique in the amount of voluminous information," the detective said.

Detective Chief Inspector Laidlaw was also quizzed as to whether he got a formal handover from Gary Jubelin after taking over from him in January 2019.

Mr Jubelin was stood down after illegally recording a person of interest.

His successor said he made the decision not to after approaching Mr Jubelin more than once.

"The discussion of the investigation wasn't at the fore and my view at that stage was that I was going to get more knowledge about the investigation from all those who worked on it."

Convicted sex offender Frank Abbott is representing himself at the inquest and asked his neighbour be recalled to answer questions about a scream she heard the day after William disappeared.

She told the court yesterday she was in the strawberry patch at her Herons Creek home when she heard a boy who sounded hurt.

In a tense exchange today she called him "a paedophile" and said "you know something Frank Abbott".

The inquest is expected to finish tomorrow after the coroner hears from both William Tyrrell's biological and foster families.