AN ALLEGED pedophile ring in the area where three-year-old William Tyrrell disappeared late last year is one avenue police are investigating in their search for the toddler.
The police update came on Friday after the boy's parents spoke about their heartbreak.
Yesterday Homicide Squad Commander Detective Superintendent Michael Willing said 12 detectives were exploring various avenues.
"One of those lines of inquiry relates to people we suspect of being involved in a pedophile ring," he said. "We are vigorously pursuing this line of inquiry, and would ask anyone who can assist in this regard to come forward."
He said they still did not know what happened to William but needed to examine every possibility.
"Det Supt Willing asked anyone with information about the disappearance to come forward.
His parents "are going through something that no parent should ever have to," he said.
William Tyrrell's parents plea: "Just give him back'
THE distraught parents of missing New South Wales three-year-old, William Tyrrell, have made a heart-wrenching plea for his safe return.
William disappeared from his grandmother's home on Benaroon Drive at Kendall, on the state's mid-north coast, on Friday 12 September, 2014.
Homicide Squad investigators believe he was abducted and hold grave fears for his safety.
Detectives today have released an interview with William's parents in the hope the tearful appeal for help will attract new information in the case.
"If somebody has him and if he's alive...I want him to be safe, I want him to be feeling loved and I want someone to be looking after him...because to imagine that something else is going on...we can't live a life like that," William's mother said.
"Just give him back...give him back. "Take him to a church, take him to a police station, take him to a school. "Give him to someone...give him back," she begged.
"You can't take children, you just can't take children...he's three!" his mother declared, "He's three years old, he's only lived for three years, it's ridiculous. "He hasn't gone to school, he can sort of count. "He's reached none of the milestones that we all take for granted.
The family arrived at the property just hours before his abduction. It was a surprise visit to William's grandmother's house.
William's mother says when he failed to respond to her calls as he played outside just metres away, she knew he'd been kidnapped.
"I had a vision in my head...I can't explain it.
"That somebody reached over and I sort of feel like they've gone "clump" on his shoulders, picked him up and moved him on...because to me...that's the only way for me to explain him not to be there," she said.
William's parents say the kidnapper or someone close to the kidnapper who might have knowledge of the crime needs to come forward and contact police.
They're urging anyone with information about the case to contact Crime Stoppers immediately on 1800 333 000.
William's father also choked back tears as he remembered his son, a toddler infatuated with the "Spiderman" superhero.
"(William loved) anything that related to Spiderman and superheroes."
William was wearing a Spiderman costume and t-shirt when he disappeared.
"He's a cheeky, vibrant little boy...full of energy. "I mean he's my little boy," his father said.
"He loved planes and we'd even taken him to the airport and watch the planes take off and land."
His father said William is a cautious child who would never accept an approach from strangers.
Homicide detectives are keen to receive any bit of information that could assist their investigations.
Callers can remain anonymous if necessary.
Police are urging anyone with information in relation to this incident to call Crime Stoppers on 1800 333 000 or use the Crime Stoppers online reporting page: https://nsw.crimestoppers.com.au/
Information you provide will be treated in the strictest of confidence.