What? McVeigh murdered innocent people. The parent is proposing investigating the prosecutor for breaching the mores and laws that govern her profession using the legal system already in place. These are not exactly equivalent.
I have no interest in defeating Washington, D.C. I have no desire to "win" if "winning" requires me thinking "like Osama Bin Ladin" (or do you mean not thinking? because I think he's dead, last time I checked).
There's no worse fear for a bureaucrat than to be hoisted by their own petard, to face a misconduct investigation, and possibly criminal and civil charges. A lot of harm can be prevented if her public service career is ended early on the count of what she has done to Aaron (and presumably others): I'd rather her career end as an associate in a think-tank (or whatever), rather than as the next Rudy Giuliani (who also started his career as a DA).