David Brooks was contracted by outgoing Council President Ryan Vaughn (R-District 3) to make maps for new precincts and new council districts to the tune of $225,000. This contract was not open for bid and was not approved by the full council or any other body. To the best of my knowledge, no one else was even consulted about the contract, including the rest of the Republican caucus and Mayor Greg Ballard (R).
According to the Rules of Professional Conduct, an attorney is essentially an advocate for their client. They are supposed to represent their client's best interest. They aren't allowed to do anything illegal, but they are under no obligation to have your best interests at heart unless you're cutting the check.
Even if you're a member of the council, the body that has the authority to redistrict, he is under no obligation to give you good advice. He is only there to represent the interests of his client, Council President Vaughn.
I'd highly encourage members of the council, advocacy groups, and citizens to to take Brooks' opinions on redistricting with a grain of salt. He is hired to serve his client's interest, not yours.