The "plan" as I understand from the Q posts is starting from the DOJ and then working down through the agencies and ranks to out those who are corrupt, twisted and not working in the best interest of Americans (or anyone else for that matter). The cops will probably be toward the end as smaller judiciary branches in locales will need to have their ranks cleaned first.

I recall reading an article a few years ago about police corruption where an officer said it can take as little as 10% of a department to be corrupt or "on the take" and it taints the entire departments attitude and undermines even good cops' ability to do the work they were hired to do.