Police investigating 'pedophile ring' link to William Tyrrell disappearance

Police are investigating the possible involvement of a pedophile ring in the disappearance of missing NSW toddler William Tyrrell. 

At a press conference today, Commander of the NSW Police Homicide Squad Mick Willing said the probe followed recent information passed on to police. 

William has not been seen since he disappeared from the front yard of his grandmother's home at Kendall on the NSW mid-north coast on September 12 last year.

Superintendent Willing said the pedophile ring link was one of a number of lines of inquiry in the investigation, which involves the homicide squad, the sex crimes squad and police from the Mid North Coast Local Area Command. 

"We’ve received specific information, and we are rigorously pursuing that information,” Supt Willing said. 

“We are determined to find out what happened.

“We have a pretty good picture about what happened on that day.” 

Supt Willing yet again called on the public for assistance. 

“If you have knowledge and you have not come forward, you could be complicit,” he said. 

The public appeal for information came as police released a pre-recorded 22-minute interview with William's distraught parents, who cannot be named for legal reasons. 

READ MORE: William Tyrrell's mother makes emotional plea for information

Supt Willing said the pair were "very brave" for speaking out. 

"They're going through something which no parent should have to go through," he said. 

"They need answers."

Police have stressed William's parents are not suspects in their son's disappearance.

If you have any information that could assist police with their investigation, contact Crime Stoppers on 1800 333 000 FREE. Callers can remain anonymous and all information is treated with the strictest confidence.