Smiling Sisters Kitty & Cookie Booked for Mom's Street Killing

Texas sisters Cookie Diaz and Kitty Diaz, along with Kyandra Faz, are accused of fatally stabbing 32-year-old mother of five Caro Peña during a broad daylight attack on a busy Del Rio street. Prosecutors say the violent encounter unfolded in public, but investigators have not yet revealed what sparked the confrontation. Court TV’s Vinnie Politan Investigates. MORE