I believe Major Fallon offered an "opinion" into the investigations in various cities. Anyone trained in interviewing persons can conduct an interview, or 10, and then offer an opinion or suggestion. It's the administrators who listen to him and then act on his word that need to be responsible for the actions in the different departments. How about conducting your own investigation and then, if need be, ask Prosecutor Taylor for help? A lot of money for a bunch of nothing, obviously!