"There has to be a mending period which can only be done if it's put on the table and everyone gets a chance to say how they're feeling," Ms Ratapu said.
She said she would like schools to be involved in the hui.
Wairarapa area commander Brent Register said police had made several attempts to set up a hui with the group.
"The last time police spoke with Myrtle it was left in her hands to organise a meeting, she has failed to do so.
"We have since been working with local iwi to try and set up a meeting and we're becoming very frustrated that Myrtle and her supporters aren't available for these meetings that we are trying to set up."
He said Mr Kawana had attempted to set up two meetings, on April 29 and May 7, and both times they did not go ahead.
"To my knowledge it didn't suit Myrtle and her whanau," he said.
"I am very disappointed that they can't make any meetings or speak to us, I'm disappointed that they can't speak to us in a forum and that they feel their only option is to protest."
A group of about 20, protesting against police treatment of youths during arrest, gathered outside the Masterton Police station for two protests at the end of March.
Police later met with members of the group, including Ms Ratapu, to discuss their concerns and statements were taken.
Police say several claims of serious injury during arrest, brought to police attention during the first protest, were not substantiated.
Some of the complaints have been lodged with the Independent Police Conduct Authority.
