Massachusetts v. White

finding that evidence obtained after suspect had "affirmatively demonstrated a desire for the assistance of counsel" could not be used | finding that evidence obtained after suspect had "affirmatively demonstrated a desire for the assistance of counsel" could not be used | statements obtained in violation of Miranda rights cannot be used for the purpose of establishing probable cause sufficient to obtain a valid search warrant | statements obtained in violation of Miranda rights cannot be used for the purpose of establishing probable cause sufficient to obtain a valid search warrant | where police had probable cause only to believe defendant was driving while intoxicated, no probable cause to search vehicle