SEATTLE Police Chief John Diaz's overly defensive response last Friday to the Department of Justice's stinging report on police use of force was followed by a more open approach Monday.

Warning bells ring loud because Diaz's first reaction was to question the federal findings. The only way he can usher in the numerous changes required is to embrace them — not swing at them.

"We have many reasons to question the validity and soundness of the DOJ's conclusions," he said last week. "We stand by the principle that their conclusions are allegations rather than findings and should be subjected to rigorous analysis."

Wrong answer, chief.

DOJ found a "pattern or practice" of constitutional violations regarding the use of force; the federal investigators also voiced concerns about biased policing.

Months ago, when the investigation was launched, Diaz welcomed the review, calling it a "free audit." But in a meeting with federal investigators last week and in news accounts, he questioned DOJ. He said he and his top command reviewed the information and arrived at a different result.

Wrong answer again. The proper response is to accept the need for wholesale change in culture and practice. These improvements require full participation and openness from the chief and police higher ups. Let's repeat — with full acceptance and behavior transformation from top command.

By Monday, the chief changed course, saying he and Mayor Mike McGinn would begin talks and work toward a negotiated agreement with DOJ. That is far better than a lawsuit, the other possible result.

At this moment, Diaz has enough all-around goodwill to try to get it right. If he cannot, he and his top command will have to move on. They have had several chances to make changes. Here is an idea: How about certain top commanders do the civic-minded thing and step aside voluntarily?

Keep in mind, the Seattle force is young and relatively inexperienced. Current training does not teach enough about de-escalation methods. Officers need better connections with sergeants and police command.

McGinn is not known for his expertise on public safety. As any agreement with the federal government advances, Diaz and top commanders have much to do. They must face head-on inappropriate use of force, cultural bias and weak management and leadership.

The city should not waste another minute resisting the findings.

Reach agreement with the federal government about the right steps forward — do so immediately.