131 I add for completeness that, in my view, the control and vulnerability of the person to whom a duty is said to be owed of which Gummow and Hayne JJ spoke in Graham Barclay Oysters, and that existed in cases such as Pyrenees Shire Council v Day[130] and Brodie v Singleton Shire Council,[131] did not exist in the present case.[132] To the extent that it could be said that the police officers here had control in respect of the relevant risk, such control was of a limited nature. In considering the question of control, it is relevant to compare the nature of the harm that potentially might have been prevented and the power that, it is said, ought to have been exercised by the police officer. The power to take the person to a medical practitioner does not operate directly to prevent any risk of harm posed to or by that person. And it is not insignificant that the nature of the harm here is one that is self- inflicted, which raises questions about the degree to which it is possible to assume control over such a risk, particularly, as s 10(1) itself implicitly contemplates, a person to whom such a duty is said to be owed might not appear to be mentally ill. It is not apparent here, for example, that, given the deceased's conduct in deceiving the police and the appellant, the exercise of power could have removed the risk to the deceased. Similarly, I think that there was no relevant vulnerability or dependence by the deceased on the police officers. The lack of effective control and the lack of dependence by the deceased on the police officers is to be contrasted with the situation in Cran v State of New South Wales,[133] where the claimant was incarcerated for an unduly prolonged period because of a police officer's failure to complete the paperwork necessary for his release and, as a result, he suffered a psychiatric illness. The relevant risk in that case would have been removed had the police officer completed the paperwork.