Ross' wife, Lucy Schwaner, is also a board member.
Ross and Williams ran together in the Citizens and Ratepayers Team for the 2010 local election.
Ross yesterday told the Herald on Sunday the charges against Williams gave "some new context to his attempt to oust a well-known and respected senior constable".
He said he supported White, who he believed had been targeted unfairly by Williams' autocratic style of leadership.
At his home yesterday, Williams told the Herald on Sunday he was advised by his legal counsel not to comment.
An online letter signed by Williams and four other board members says he and White are "often diametrically opposed" and he believes she does not have enough time for the job.
"I wanted to give Adele the opportunity to allow this important change to occur by moving aside quietly and with dignity, and to this end I took her aside privately and asked her to resign. Adele has chosen not to resign," he wrote.
The letter was signed by member Steve Udy who yesterday said he had not been aware of Williams' charges.
"What I would say is he has been a little bit silly but that has nothing to do with Adele not being the right person for the job. He may have a Caesar complex but we have to live with that," he said.
Lucy Schwaner said she could not understand why Williams was trying to demote White. " I don't know where he's coming from. Adele has served her community well," she said.
She said she was shocked to hear about the charges.
"If those charges are proved, I don't think he should hold his position as chair. I don't think that is suitable for a person in his position," she said.