Research Bleg

Its taken as almost an article of faith among the gunnie blogs that the Supreme Court has ruled there is no duty on the part of the police to come to the aid or assistance of a private citizens.

I know not whether that is the case or not, and frankly don't have much time to research it on my own. I was thinking of having my assistant look it up for me, but then I thought surely some gunnie blogger out there could probably direct me to the case in all of 30 seconds.

So, any one know the name and/or citation for this infamous Supreme Court decision?