Commonwealth v. MacDonald
2011 Mass. LEXIS 150
SJC-10737
March 18, 2011
Supreme Judicial Court
Criminal, Controlled Substances, Sufficiency of Evidence, Expert Opinion, Melendez-Diaz, Lack of Drug Certificates
A jury convicted the defendant of distributing marijuana and committing a drug offense near a school. The defendant appealed, arguing that the judge erred in denying his motion for required findings of not guilty because the testimony of the Commonwealth’s expert was inadequate proof that the substance seized was marijuana. The SJC found that in these specific circumstances, the expert’s testimony regarding the substance at issue was sufficient evidence that it was marijuana. In addition, the SJC denied defendant’s invitation to require a cautionary jury instruction concerning forensic testing or to limit the Commonwealth’s use of the facts in evidence in forming a hypothetical question for an expert witness.