Ah the good old "if you come clean it will go better for you" tactic, you have to love how they sell their lies to trap you. You did the right thing, you gave them nothing and they had nothing, hence you get to walk away a lot wiser and hopefully more careful in future. Have heard the Scandinavian countries do this, i.e. make you come in and if you don't then issue a warrant so I get you had no choice, you should however have had your legal representation present with you though irrespective of whether you felt that may look more incriminating. Glad you kept your wits about you and handled the situation well, pleasing to read someone actually takes the time to educate themselves on how to avoid nasty consequences. Stay safe.