A jury found Ford negligent and awarded $US3.3 million to the seven-year-old son of a woman killed when the air bag of her Ford Taurus deployed in a low-speed accident, Associated Press (AP) reported. Mayling Semidey, 29, a single mother, hit a concrete retaining wall at about 9 mph in 2000 and the air bag went off and caused fatal chest injuries, AP said.