Tech guru captivated Canada, fled to China

Sun Yian was living the Canadian dream. The Chinese immigrant found fortune harnessing Canadian talent to develop cutting-edge technology, everything from semiconductors to facial recognition, to take back to China. His company grew to more than 1,500 employees across China and North America. Then Sun stopped paying his Canadian workers and fled to China. Left behind are lawsuits from angry investors and Canadian employees who are wondering whether their work could be used to help China’s growing domestic surveillance state.