The cops can do almost anything they want now. The patriot act is way too large to cover here.
Do some research on it. It is huge.
"Sneak and peek" has been used to bust dealers. All they need is an okay from a judge. They can go into your house and look around. Without a warrant.
It was supposed to be for terrorist. However cops can twist this law by saying you are dangerous, getting permission, gathering evidence and then getting a warrant.
I am sure you have heard the connection between drugs and terrorists.
If a cop wants you they can twist any law they want.
Research the Patriot act.
Assume they can and act accordingly.