[It is] settled constitutional law that ... police could not enter a dwelling without a warrant even under statutory authority where probable cause existed. The principle that government officials cannot coerce entry into people's houses without a search warrant ... is so well established that any reasonable officer would know it.
Appellants' claim, that "a search warrant is not required for home investigatory visits by social workers," is simply not the law.
[N]owhere is the protective force of the fourth amendment more powerful than it is when the sanctity of the home is involved. & Therefore, we have been adamant in our demand that absent exigent circumstances a warrant will be required before a person's home is invaded by the authorities."
Case law: Calabretta v Floyd 189 F.3d 808 (9th Cir. 1999)