Evett I W, Foreman L A, Lambert J A, Emes A
Forensic Science Service, Metropolitan Laboratory, London, UK.
J Forensic Sci. 1998 May;43(3):472-6.
A recent case is described where the evidence of bloodstaining on a knife suggested that it was a mixture from the two victims. Interpretation of the evidence in this problem necessitated the formulation of several sets of multiple hypotheses which were analyzed by means of a tree diagram. The problem was then greatly simplified to one of comparing the two alternative hypotheses of most interest. It was found that results were robust to variation in the expert's judgment regarding the possibility that a mixture of blood was present on the knife.
最近描述了一个案例，一把刀上的血迹证据表明它是两名受害者的混合血迹。对这个问题的证据进行解读需要制定几套多重假设，并通过树形图进行分析。然后，这个问题被大大简化为比较两个最受关注的备择假设之一。结果发现，对于专家关于刀上存在混合血迹可能性的判断变化，结果具有稳健性。
