My answer to this question could fill pages. The police needed a warrant or consent to search your house. You were right in making them get a warrant. They are required to give you a copy of the warrant and a list of items they took. If the warrant was not actually signed by a judge, it is not really a warrant and any evidence should be suppressed. No, the police should not parade victims through your house during a search. The law on search and seizure is somewhat different for cars than houses. You should sit down with a criminal lawyer and go through this incident in great detail t see where you stand legally.