Pennsylvania v. Muniz

We must decide in this case whether various incriminating utterances of a drunken-driving suspect, made while performing a series of sobriety tests, constitute testimonial responses to custodial interrogation for purposes of the Self-Incrimination Clause of the Fifth Amendment.

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During the early morning hours of November 30, 1986, a patrol officer spotted respondent Inocencio Muniz and a passenger parked in a car on the shoulder of a highway. When the officer inquired whether Muniz needed assistance, Muniz replied that he had stopped the car so he could urinate. The officer smelled alcohol on…