After a person is arrested, they are read their Miranda Rights. Statements you make before your arrest can be incriminating and used against you in court. But, any statement you make from the time of handcuffing until the Miranda Rights are read cannot be used against you. If it happens that the prosecutor's case is based on those statements, your case may be dismissed. Usually in most cases of DUI the prosecutor will have other evidence to use against you other than those statements.