They only need to Mirandize you if they actually arrest you. Failure to mirandize you will not void the charge and/or arrest, but will prevent any evidence gained in violation of it from being presented at trial. In other words, if you were actually arrested, and you were not mirandized, any statements you made could not be used against you, but if you were not actually arrested, then anything you said can be used in court.
Answered on Sep 05th, 2013 at 3:17 PM