It was the bloodiest clash between Chinese police and civilians since Tiananmen Square. On a December evening in 2005, hundreds of paramilitary police descended on Dongzhou, a fishing village in the southern Chinese province of Guangdong. At seven o'clock, security forces fired tear gas canisters erupting into a crowd that had gathered to protest a power plant being built in the hills. The demonstrators didn't disperse, so at eight o'clock, police began shooting into the dirt with their AK-47s. "Finally," one witness said, "at about 10 pm, they started killing people."