Tyrrell parents plead: bring our boy home

The family of missing NSW toddler William Tyrrell have penned an emotional plea for members of the public to come forward with the clues police need to bring their child home.

His parents met with Justice Minister Troy Grant and his shadow counterpart Jodi McKay at NSW Parliament on Tuesday, just over a year from the day the then-three-year-old disappeared from his grandmother's yard on the NSW mid-north coast.

In an open letter read to journalists, the Tyrrells thanked members of the Kendall community who have turned out again and again to search for William and given their support.

"We love William. And when he was home, we treasured every second of every day with him," they wrote.

"Now, with William missing, we are faced with having to live our lives as a family incomplete.

"We have to face holidays, sunrises, sunsets without him. New Year's without William. A Christmas without him. A birthday for William but without William."

Investigators say they have been inundated with phone calls from the public.

But Mr Grant said someone in the community holds the final piece of the jigsaw puzzle.

"We're calling on you to do the right thing and provide us, the police and CrimeStoppers, with that bit of information that will bring this family peace," he said.

Bravehearts CEO Hetty Johnston said there may be people who know the identity of William's kidnapper but are too frightened to come forward.

"You can have anonymity, the country will wrap its arms around you to support and protect you. But if you know something you must come forward," she said.

In their letter, the Tyrrells said they were overwhelmed by grief and worry but still held out hope for a family reunion.

"We hope that together we can help police find William and bring him home," they wrote.