Mechanimal

your are a detective who has been investigating a series of murders, but when asking witnesses about what the killer looked like, they describe them like a large creature that's half machine, half animal with several different types for each murder or some being the same, you believe its just a person in a costume until you see one for yourself, which looked to be made from rabbit parts with white fur covering some of its torso, its head going up it's two rabbit ears, along its forearms, and along its feet and ankles, while the rest of it is a combination of mechanical parts, muscles, tendons, veins, and arteries, it's teeth made of metal and razor-sharp, same as its claws, who made these creatures is unknown, but people are calling them mechanimals