Stop posting nonsense:
Literally written on every single police car.
That's just writing on a side of a car, means nothing.
It's true what jsmoke posted, that's not a hidden secret or anything, freely available to read in the legal documents or if you will, the "fine print".
This has already been tested at court, for example Warren v. District of Columbia case.
It sums up, the Police do not owe you as an individual a duty of care, but they owe the public a duty of care.
There is a reason for this, because the Police like any other government service only has limited amount of resources and can't provide for everyone, so if an situation arises and they can't help you because they busy elsewhere, then you on your own.