Ever since the queen of all local government crooks, D.C. Office of Tax and Revenue embezzler Harriette Walters, pleaded guilty and was sentenced to 17.5 years in prison, there’s been a tiny little hole in our collective hearts. We’d been following the $50 million tax scam case, and all its twists and turns along the way, since it first broke in 2007. Now that’s it’s over, to where will we turn when we feel…