 However, if Richard was guilty, nothing in Weir's book demonstrates it.Essentially, her 'proof' that he murdered his nephews consists of two skeletons discovered in the Tower of London in 1674, some inferences wholly unsupported by the 'evidence' she offers and the opinions and assertions of 'contemporary' sources such as John Rous and Thomas More, which Weir is inclined to treat as proven fact.The conclusion Fields reached is that the probability that the princes were, in fact, murdered is about 50% to 70%, and if they were, the probability that Richard did it is in the same range, so the logical probability that Richard is guilty is 25% to 49%, which is less than 50-50.