Carnage without Apprehension

What people call the "Perfect Murder", a label put to an experiment that sent the world to shit within a month. The lust to be perfect, the need to be accepted by everyone and called beautiful by a stranger. It drove teenagers and adults into a panic driven state, killing each other to try to come out on top as the most perfect and deadly person the world has ever seen. When you kill someone, you gain their best trait, and that alone is reason to kill. Though things seemed to calm down, there's a dangerous creature hidden in the shadows taking the lives of the unexpected, driven not by the want to be perfect, but instead the lust for blood.

This will be set up a little differently, Part 1 will be from the perspective of the murderer, part 2 will be from a cops, part 3 is a series of victims perspectives, and finally part 4 is still a work in progress as to whose perspective it'll be from.