Revenge
The coyote padded across the road in the still night air of St. Hallow's Eve. This was not a random wild animal. No, this was a human, a witch. And she was out to get revenge. Revenge for her cousin, her childhood best friend. The sight of his lifeless body still haunted her dreams. She was there, when he died. She could have stopped that deadly curse. But she didn't so now, she is going to get revenge.
She sees the house. Too easy, too easy. She pads in. They are all there. Yet no one sees her. She steps into the light. One has noticed her. The alarm goes up. But she is to fast, already, she is at His throat. The one she is looking for. She sinks her teeth into his throat, deeper, deeper. She leaps back, and watches. All too quickly, the dark lord Voldemort is dead. She jumps, leaping over masked figures. The coyote escapes.
She runs into an alley, changes, quickly. Grey coyote fur turning into long, thick black hair. Bellatrix Andromeda Potter is back.
She takes a deep breath, smooths down her robes, and prepares to be the worshipping, devoted follower of the dead dark lord Voldemort.
On the night of St. Hallow's Eve, 1982, Bellatrix Andromeda Potter avenged the death of James Edward Potter. But no one will ever know.