Go to the station, make your one phone call and await your lawyer. Until your legal representation arrives, stay mute. That is, "My name is _______ and I want a lawyer." PERIOD. Not one word more. No nods, no dirty looks, no nothin', and keep your hands to yourself.

Laws differ from country to country. Many have what are loosely called Miranda rights or something similar. Use the right to remain silent, because anything you say can and will be used against you. imo.