Humanity's new natural predator

Humanity since the dawn of civilizations has put a strain on the natural world. Entire ecosystems have been changed with the introduction of domesticated animals and other invasive species as humans migrate across the globe bringing their livestock, pets, and pests with them. Humans also grow unchecked because we haven't had a natural predator besides ourselves since the Early Pleistocene Epoch.

I propose a genetically modified "natural" predator, it would have to be fast, stealthy, and big enough to follow humans in-doors. It would need to have a thick hide to protect it against bullets and intelligent enough to survive evade capture and avoid traps.