Abstract

In recent decades a number of criminal convictions have been reversed on appeal, partially on the basis of problems associated with the use of scientific evidence adduced by the prosecution during the trial. These miscarriage of justice cases have received considerable attention from news media, legal commentators, criminologists and in formal public inquiries. Most responses to these cases have been critical of the scientific evidence originally relied upon at trial. Few commentators have been critical of, or even reflective about, the scientific evidence used to acquit. Generally, their analyses have utilized idealized images of science and scientists. In contrast, by importing the concept of methodological symmetry from science studies, this paper aims to identify and explore the conceptual disparity (or asymmetry) between the assessment of scientific evidence used to convict and the scientific evidence used to acquit. In order to illustrate some of the limits to conventional approaches to miscarriages of justice as well as examine the judicial use of scientific evidence this will be undertaken in relation to the successful appeal of the Birmingham Six