The mother of the teen killed by a tiger at the San Francisco Zoo says one of two friends injured in the attack told her that no one had done anything to taunt the animal. Marilza Sousa spoke with Paul Dhaliwal by phone on Monday - their first conversation since the Christmas Day attack, the San Jose Mercury News reported Thursday. Sousa said Dhaliwal, 19, told her the tiger jumped over the fence while the trio was talking and tore a long gash in his skull before wrapping its jaws around the throat of her 17-year-old son, Carlos Sousa Jr., killing him instantly, the newspaper said. Dhaliwal's 23-year-old brother, Kulbir, also was mauled but survived. Police officers killed the tiger.