A Knife in the Dark

It's been several months since the rumors started, people snatched off the streets at night and found the next morning throat slit from ear-to-ear. Their blood completely drained, yet not a drop to be found nearby. At first it was just a few people that society looked down upon - the impoverished, the "immoral", or just the inattentive. Common wisdom said to "Keep your wits about you should you find yourself alone at night, otherwise you'll fall prey to The Ripper and it'll be your own fault". After all, the streets of London had already been dangerous, what was but a few more murders?