Amaya Cookie Diaz, 19, and Kitty Mia Diaz, 21, were taken into custody by officers in Del Rio — a small city near the Mexican border — just hours after cops say they repeatedly stabbed mom of 5, 32-year-old Caroline “Caro” Peña in broad daylight. Footage taken from outside the siblings’ home showed a barefoot Kitty – wearing tight black shorts and a halter top with an illustration of white hands cupping her breasts – grinning briefly at the ground as two officers escorted her into a patrol car.