According to the Fourth Amendment, what can't the police do?

Was american neutrality between september 1939 and december 1941 a tragic mistake

In an effort to end the civil war, in 1864 the union planned to

In order to get a consensus between anti-federalists and federalist to be able to forward on the constitution, james madison advocated for a bill of rights. what was the purpose of the bill of rights for citizens of the united states?