 A study of the trial transcript shows that Keeley’s choice of hypotheses lacked coherence and the likelihood ratio based on them was therefore meaningless. On one occasion, Keeley compared the hypothesis that the particle found in George’s pocket came from a gun fired by George himself, and the alternative hypothesis that the particle came from another source. On another occasion, Keeley took the prosecutor’s hypothesis to be “The particle found in George’s pocket came from the gun that killed Dando.” But the conditional probability of the evidence given this hypothesis should not be low. It should actually be one. The most charitable reading of the trial transcript suggests that the expert had in mind the hypotheses “George was the man who shot Dando” and “The integrity of George’s coat was corrupted”. But Keeley gave no justification for why these hypotheses should be compared in the likelihood ratio (see Fenton et al. 2014 for details).