2013-07-03

Cato: DNA and Doctrine in the Supreme Court

This week, the Supreme Court considered whether collecting DNA from an arrestee was an unreasonable Fourth Amendment search.
Or at least that would have been a good way for the Court to frame the question.
Instead, much of the oral argument in Maryland v. King dealt with the question whether swabbing the cheek of an arrestee to take a DNA sample upsets one’s reasonable expectations of privacy. The “reasonable expectation of privacy” test is doctrine that arose from Justice Harlan’s concurrence in Katz v. United States. The test asks whether a person claiming the Fourth Amendment’s protections had a subjective expectation of privacy and whether it is “one that society is prepared to recognize as ‘reasonable.’”
The government’s case rests on that framing, which is why Deputy Solicitor General Michael Dreeben began his argument by saying that arrestees are “on the gateway into the criminal justice system. They are no longer like free citizens who are wandering around on the streets retaining full impact Fourth Amendment rights. The arrest itself substantially reduces the individual’s expectation of privacy.”

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