 The rock supposedly found in the lake , said to be taken from the Park 's garden wall , has been challenged as evidence in multiple places . Both articles say that the police diver had no memory of recovering it , and he claimed that if he had found it , he would have placed it back . Professor Kenneth <unk> , a defense witness , said that there was no evidence that the rock had ever been on the lake bed at all . The article in the Sunday Herald also claims that the policeman said to be responsible for finding the rock fainted when it was produced in court , offering no explanation , but still denying that he ever found it . 
