Any information from the public would be welcome, she said.
Police are reluctant to speak with media about the alleged attack by three or four assailants in Manse St, near the Regent supermarkets, on the evening of September 9.
Before the attack the boy had been at the Wednesday night church youth group which he regularly attends.
Pastor Stephen Battye, from Whangarei Central Baptist Church, said he only found out a few days after the attack that the boy had been hurt and was seriously ill. He said the church was now working with the police to piece together a timeline that might cast light on events leading to the alleged attack.
Mr Battye described the injured boy as "an awesome guy, a really nice, well-liked boy".
The church took measures to ensure young people attending church activities were accounted for at all times while they were there, he said. They included members having to sign-in and sign-out, and a patrol of the grounds and environs by parents and church members.
The news had quickly ricocheted around the school's students, and Whangarei Boys' High School staff were officially informed by principal Karen Smith last week. Ms Smith was unavailable to speak with the Northern Advocate before edition time yesterday.