Why was this a surprise?
It was a relative peace; after all, there were only a few deaths a year. Ones that were humane and under control, nothing too wrong with that.
Well, if you get caught, yes.
On July 4th, in the middle of a field while many watched the fireworks explode in the night sky; one was enjoying a meal he had chosen from the midst of the humans.
This man was a supernatural being, one who had been wandering the human world for his entire life, killing for food was a natural thing. Being caught by a gun-happy policemen was not.
The being was killed and was pulled into an autopsy, where they discovered more than just his looks. He wasn't in the least bit human; sure he looked a little like one, but underneath the skin he was much more.
Citizens were outraged and terrified; never a good combination; and as a result, they created a war between themselves, and the supernatural.
Many more sightings came up over the next year, mostly around largely populated areas, and in haste to get rid of the threat; the people killed anyone they thought was not human.
Naturally; this lead to far more troubles, such as loss of innocent lives, and as a result, more fighting.
The year is 2024; the war has spread all over Earth; between the Supernaturals, and the humans. Frightened people have set up safe houses, while others simply go out and shoot anything that moves, a dangerous place to be in for anyone.
Be warned, my friends, the killing has begun.