'It has been very difficult': Man who had house excavated in William Tyrell investigation thanks public for support

Bill Spedding, the man at the centre of the investigation into the disappearance of William Tyrell, has spoken publicly for the first time.

He said along with his wife, he was absolutely overwhelmed by the support they had received from the community after their NSW mid-north coast home was excavated as part of the investigation.

"It has been very difficult. I wish to thank our family, our friends for the overwhelming support that we have received from them over this time," Mr Spedding said.

Police are awaiting the results of forensic testing of items found in the home before they take the investigation any further.

William Tyrell disappeared from his grandmother's home in Kendall four months ago.

No charges have been laid and Mr Spedding is not being considered a suspect.

Mr Spedding visited the grandmother's home four days before the boy's disappearance after a request to repair a washing machine.

A close friend said Mr Spedding didn't return to the Kendall home with a spare part for the washing machine on the day William went missing because he couldn't get in contact with the grandmother.

William's mother told Mr Spedding in a phone call on the afternoon of September 12 that he wouldn't be able to come around that day.

It is understood in the days after William disappeared, and as hundreds of volunteers searched for the toddler in surrounding bushland, Mr Spedding's work whitegoods van was spotted in the Kendall street outside William's grandmother's home.

It sat alone among police and emergency services cars.

Police seized a mattress and a computer among other items in a search of Mr Spedding's home, pawnbroker business and unit in Laurieton this week.

Police tape was removed from Mr Spedding's Bonny Hills home on Thursday after it was excavated and the septic tank emptied.

The Speddings are carers to three grandchildren.