On an early morning in December 1991, a woman woke up to pounding on the door of her home in Largo, Florida. She could hear a woman outside screaming for help. She rushed out of bed and opened the door – and saw her neighbor on the doorstep, drenched in blood. Her head was covered in gashes. Her throat had been slit. But before she could say a word about what had happened to her, she fell back and collapsed on the front lawn.