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Maryland v. King (2013) ​


Overview ​

Maryland v. King addressed the legality of DNA swabbing during the booking process after a lawful arrest.
Officers took a DNA sample from the defendant, which linked him to an unsolved rape case.

Ruling ​

The Supreme Court held that DNA collection during booking is a reasonable search under the Fourth Amendment. It serves legitimate state interests in identifying arrestees and solving prior crimes.

Key Holding ​

“When officers make an arrest supported by probable cause, taking and analyzing a cheek swab of the arrestee’s DNA is, like fingerprinting and photographing, a legitimate police booking procedure.”

Implication ​

This decision confirmed DNA swabbing as a standard, constitutional identification method during booking, similar to fingerprinting or photographing.

Quick Guide ​

  • DNA collection is lawful upon booking for serious offenses.
  • Can be used to link suspects to unsolved or ongoing investigations.
  • Officers must ensure samples are handled and logged properly.
  • Does not violate privacy rights when done post-arrest under proper procedure.