Police investigating allegations by Anihera Black that a paedophile ring has been operating in Tauranga say they have been unable to substantiate the allegations.

In July it was revealed that police had spoken to Te Awanuiārangi Black's widow about allegations her husband was a paedophile.

Police said that based on the information available, they were unable to progress the matter further at this time.

"We understand that these allegations have caused considerable distress, not just for Mrs Black and her whanau, but for the wider Tauranga community," a police spokesperson said.

"We want to assure the community that police have taken these allegations seriously and have investigated accordingly."

Police welcomed contact from anyone who wishes to share information about the allegations but had yet to make contact.

Anihera Zhou Black posted the allegations against her husband, who died in 2016, on Facebook.

"I wondered why Awa invited so many young people through our home over the years and I thought it was to be a good aunty and uncle. I know differently now," she posted.

"He became a predator, a recruiter, a teacher, a pimp, a ringleader of one of the many child-adult sex rings here in his beloved Tauranga Moana and he took that s*** nationwide with all his contacts in every stream of life.

"They would recruit the innocent ... share them around like a box of beer, consume every last drop and discarding the empty vessels into the gutter, soulless, cold and broken."

The couple were married for 26 years.

Zhou Black later told the Herald her husband was involved in a ring of abusers which goes to "the highest heights you can imagine".

"This goes deep and wide, in terms of the paedophile ring, to the highest heights you can imagine. These people aren't just labourers and workers at fast food restaurants. These people are suits and people in power."

Black was a regional councillor, Maori Party political aspirant, a commissioner at the Maori Language Commission, lecturer at Te Wananga o Raukawa and Treaty of Waitangi negotiator for Ngati Pukenga.

Zhou Black said her decision to denounce her former husband was intended to give strength to victims of abuse.

She told of her belief Black had used their marriage to mask his predatory sexual behaviour towards children and her growing horror as she realised he was not the man she had believed him to be.

More to come.