And the butterflies start to flap. Dumbledore is not going to enjoy the coming storm.

As I commented on a previous chapter, if the Master title Snape has is from an organization that operates on traditional Guild rules, he could be stripped of his Mastery for refusing to teach or being unable to teach. The report in this chapter is exactly the sprt of evidence such an organization would need to do so.

Dumbledore describing the Hogwarts wards prohibiting the entry of level 5 or higher creatures doesn't make a lot of sense, because the scale only goes to 5 - there is no such thing as a level 6 or XXXXXX creature. Trolls are XXXX, so even without the security troll exception, they'd still be able to get in.

Two things about this chapter.

First, you have a recurring typo. You've now used the word scraping twice, but both times you spelled it scrapping. Scrapping is a synonym of salvaging and recycling. Scraping means to rub against something so closely, part of it (or you) gets broken off in passing.

Second, the entrance of the kitchens is right across the hall from the entrance to the Hufflepuff Dorms - if you're running towards the kitchens, you're also running towards the Dorms, since they're about 20 feet apart.

Something that has always amazed me about Severus Snape is that he still has his Potions Mastery after ten years of demonstrating that he has no interest in teaching students or ability to do so.

In the Guild system - which is where the Apprentice, Journeyman and Master titles come from - one of the prerequisites of Master rank is the willingness to teach a student and the ability to do so. A Master is a Master of all aspects of his or her area of expertise. There are many Journeymen throughout the thousand-plus years the system has been in use who never attained Master rank because, despite their skill being the equal of any Master, they had never successfully trained a student.

If whatever organization it is that awards Masteries in the wozarding world does operate under Guild rules, if someone reports Snape's disability to them, he might get stripped of his Potions Mastery!

I don't know if it's just my mind making everything into ASOIAF references, but the name Brackwood seems like you combined the names Bracken and Blackwood but then again it's just probably my messed up mind.

GREAT story! Keep it up! I love the plot!
My, how things snowballed. They just wanted custody, and now Sirius it's free and clear, Pettigrew is in the rat room, tons of death eaters are in holding cells, the DMLE is getting funding, Hogwarts wards are getting updated, etc.
Harry didn't have hardly a thing to do with it either!

Wonderful story!

O.o those colors tho.

Uh, neglecting a child is child abuse

more please want to see peter get caught :D

A marvelous story! Please finish it. I want to know what happens next.

Anything new happening on the story Muggleborn Teacher. I love it. I'm looking forward to them finding the rat and the trails of all those DE's that they arrested.

Cool story hope to see more soon

ooooh... this story is so good... really coming at this issues from a different side and from a single AU point. I see it hasn't been updated for a while... I really hope you can finish it! It is REALLY wonderful!