If the police ask you to come to the station and talk to them, but you are not under arrest, you do not have to do so. If you say anything incriminating during this "voluntary cooperation" session it can be used against you. Since you are not in custody, the police have no obligation to remind you of your right to remain silent. This is not to suggest that you should be rude or lie to the police; simply tell them you do not want to talk to them without your attorney present. You also do not have to agree to have your photograph taken or submit to fingerprinting if you are not under arrest.