 The list included Mrs Morrell, Mrs Hullett and two other cases in which evidence had been taken on oath, these being among the cases where Hannam considered he had collected enough evidence for a prosecution.Devlin considered that Mrs Morrell's case, which was chosen by the Attorney-General for prosecution, looked the strongest of Hannam's preferred cases, despite it being six years old, although he noted that some others believed that the Hullet case was stronger.Murder is a criminal offence under the common law of England and Wales, defined as "the unlawful killing of a reasonable person in being under the King or Queen's peace with malice aforethought express or implied", and matters outside this definition are not murder.