Police have not given up on the investigation into the disappearance of William Tyrrell, as his family and foster family mark three years since he vanished.

The three-year-old boy, who would be six today, was last seen playing in his foster grandmother’s garden at Kendall, on the NSW north coast, on September 12, 2014.

Detective Chief Inspector Gary Jubelin, who leads the homicide investigation, said police were only interested in ‘genuine information’ from members of the public, reports Daily Mail.

‘We are not interested in sightings of a child running around in a Spiderman suit playing in the McDonald’s car park … or information from clairvoyants or people that have dreams,’ he told reporters on Tuesday.

New light has been shed on William’s life in the past month, following a failed bid from the NSW Department of Family and Community Services to keep his in-care status private.

William’s biological parents, Brendan Collins and mother Karlie Tyrrell, were named but are estranged and have maintained their silence.

‘Sadly the probability of (William) being found alive continues to decrease with the passage of time,’ Supreme Court judge Paul Brereton said in his January decision.

But William’s foster family won’t stop searching.

‘We will never give up hope that you will be found and returned home to the arms of your loved ones where you belong,’ they said.

A renewed national appeal for information began this week, publicising the $1 million reward on billboards and in shopping centres, offices and cafes.

Detective Chief Inspector Gary Jubelin insisted on Tuesday the case was ‘very much ongoing’.

‘We will not give up on the investigation… (it is) currently very active,’ he said.

He said detectives believed William’s disappearance had ‘human intervention’, and reminded the public about the $1 million reward for information that leads to the recovery of the little boy.

‘The information might be in the form of someone who has concerns about someone they know. Someone within their family.

‘The way they react when his name is mentioned might cause suspicion. We are interested in speaking to those people. If we speak to those people, we can do it with the strictest of confidence.’

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