People need to learn that if the police don't have a search warrant and the person is not on probation / parole, then the police have no right coming into your home. DO NOT LET THEM IN FOR ANY REASON, even if you have done nothing wrong, it's your right!
All they need to see is your license and possible a rent stub or similar to prove you live there and nothing more, and DO NOT SIGN ANYTHING!
You can ask a lawyer and I am sure they will tell you the same thing, but, I am not a legal expert.
You will also notice they use PINK slips just like the Nazi's did during Hitler's reign.