How great! I sometimes find AUs a little over-the-top in terms of utilizing aspects of the original characters, but you did it brilliantly! I really liked the hard-nosed, secretary-noir Hermione, and Albus as the police commissioner was superb.
It is, of course, the interaction of our two boys that is most important, of course, and you captured them perfectly, between Snape's snark and Harry's guileless banter.
The whole thing was hysterical, and your song interpolations were too funny!