"We can't release that information until we release the report," he said.
But Ms Walters' lawyer Andrew Holgate said his client is out of the country until next week and she had not been asked to take part in the review.
Mr Holgate thought it was unusual that one of the main people involved would not be interviewed by the review team.
"We've heard nothing from [the review team]. In terms of natural justice she had an expectation she would have been consulted as part of this.
"But until we see the result of the review there's not a lot we can do. However, the legitimate expectation would be that if they were going to make any finding against Ms Walters or a finding adverse to her interests that would be discussed with her first."
The review has not been without controversy with another mayoral candidate Crichton Christie saying the panel lacked independence and he wanted a "fully independent" review that did not involve any councillors. He said they were too close to Mr Simpson.
At Wednesday's WDC meeting Mr Halse heaped praise on Mr Simpson in relation to reports and management plans presented in the agenda.
Mr Halse mentioned Mr Simpson's advocacy role on the Upper North Island Strategic Alliance (UNISA) which collaborates on issues of mutual benefit and long term outlook. Mr Simpson is one of several Northland-wide council employees or representatives on UNISA.