This is an issue that Roger Kopel has been tackling for years now. His main research has been in the social epistemology of forensic science. He has argued that there is a bias towards conviction. In 2008, he published an article arguing that it was necessary to move away from the "monopoly epistemics" towards "democratic epistemics." See his paper here: http://journals.cambridge.org/action/displayAbstract?fromPag...