" That is murder (in English law) for the policeman must essentially and objectively have considered the risk of killing me or doing grievous bodliy harm to me and at best then disregarded it."


In American law, if a person is killed ( even by the police) when someone commits a crime, the person COMMITTING the crime is held responsible for murder, or at least willful homicide. IF the police are shown to have disregarded standards ( ie, acted contrary to established rules) then they, too, can be held at fault, but almost always to a lesser degree.