There have been numerous court seeking redress when police departments failed to protect citizens and the courts ruled that protection of citizens is not a constitutional duty of government employees. Consider these two Supreme Court Decisions:
In the 1989 landmark case of DeShaney v. Winnebago County Department of Social Services, the U.S. Supreme Court held that the failure by government workers to protect someone (even 4-year-old Joshua DeShaney) from physical violence or harm from another person (his father) did not breach any substantive constitutional duty.[3]
A more recent case was specific to police responsibilities:
On June 27, 2005, in Castle Rock v. Gonzales, the U.S. Supreme Court again ruled that the police did not have a constitutional duty to protect a person from harm.[8]
These two USSC decisions alone should firmly convince any sane American that Second Amendment rights are a matter of self preservation.
It was the Castle Rock ruling that caused police to remove the ‘protect and serve’ slogan from their vehicles