Two weeks ago, at a conference in South Africa, Wendy Orr told how, as a young prison doctor in 1983, she had exposed evidence of police torture and abuse of political detainees under the apartheid regime. At the time, Dr Orr was placing her career and perhaps even her life on the line. But she was driven by the belief that her sole duty as a doctor was to serve the sick. Overseeing (and implicitly condoning) a system …