NASHVILLE, Tenn. (WTVF) — New documents show tension between the Nashville Police Department and Community Oversight Board isn't letting up, and the board wants the mayor to intervene.

Last month the board, which investigates claims of police misconduct, reported running into issues getting information they needed from Metro Police. Chief Steve Anderson responded, saying the COB made requests for "huge amounts of records," and that the department continues to evaluate the requests.

This week, documents posted to the board's website suggest both parties can't agree upon a memorandum of understanding (MOU).

In an email to COB executive director William Weeden, Chief Anderson wrote, "it does not seem that a Memorandum of Understanding provides the best vehicle to publish MNPD policy" and that "a MOU would be a cumbersome method of stating MNPD policy."

In an email to Chief Anderson, COB executive director William Weeden said, "we invited you to provide meaningful input in the drafting process, but you never responded to any of our request for collaboration in the effort."

The COB is now asking Mayor John Cooper to step in an "offer productive and positive pressure to ensure Chief Anderson arrives and remains at the table during the MOU negotiations."

You can see the emails and documents posted by the Community Oversight Board on their website.