Stories of vampires date back farther than I care to remember. Bloodsucking terrors of the night with large canines that can transform into bats. That said, they're merely works of fiction; stories meant to keep their reader awake at night shivering.
That's where stories like the Chupacabra rear their ugly head—presenting the exsanguinated corpses of cattle as its grisly prizes to unfortunate farmers. Whether or not those killings are the work of a mutant canine or alien is up for debate, though it's often agreed upon it isn't a vampire. After all, no humans were harmed.
And that's true. The Chupacabra hasn't claimed any humans—yet anyways. However, if we take a trip back to 1932 and go to Stockholm, Sweden, we'll find that there was one person who was ahead of his time. Someone who almost no doubt had some sort of obsession with vampires. They came and went in the snap of a finger and left behind arguably one of history's most unnerving unsolved murders.
They were simply known as the Atlas Vampire.