Dreaming about the Police or authority figures chasing after you or even cuffing you in front of everyone you know represents a deep-seated fear of being humiliated. You are obviously feeling guilty about something that you've hidden it from everyone you loved and the "Policeman" signifies the possibility of being caught red-handed with that awful secret.
Relax, secrets can be suffocating that even our subconscious may think we have committed a crime. How much of your internal monologue is consumed by guilt? Think about it. It could be just magnified by your own thoughts, but this secret whatever it is may not be so bad as you think. You are doing yourself a great injustice by being imprisoned by this guilt. So let it go, if you let someone you hold in high regard down with disappointment, learn to live with it and be easy on yourself.