The petitioner, Jonathan Carvalho, appeals from a judgment of a single justice of this court denying his petition pursuant to G. L. c. 211, § 3. We affirm.
Carvalho was indicted for murder and unlawful possession of a firearm. The Commonwealth moved to compel Carvalho to provide a buccal swab on the basis that it needed deoxyribonucleic acid (DNA) evidence to try to exclude Carvalho as a possible source of blood found on his sneakers. Over Carvalho's objection...
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