Harry Potter experts? Help me out!?

Tell me eeeeeeeverything you can about the character Scabior. Personality? death? wizard? muggle? death-eater? not? hogwarts attendee? home? encounters? Everything you know. And on that note could you please explain a Snatcher? Anything and everything you know. Opinions are fine, too. But I'm talking about book-verse, no movie verse, tho.