463 Mass. 353 - Appellee Commonwealth Brief - Mass Cases

informants are used in drug investigations, and
described how search warrants are executed. (Tr. 2:
60-61, 63, 65.) He also testified that he himself had
worked undercover numerous times and that during his
drug investigations he had seized cocaine hundreds of
times and marijuana approximately one hundred times.
(Tr. 2: 60-61, 65.) Sergeant Montana also discussed
what street-level distribution was, described how hand
to hand drug transactions worked, and explained how
cellular phones are used to facilitate those
transactions. (Tr. 2: 65-68.) He went on to explain
what cocaine and marijuana look like, discussing the
various forms they come in, and then described how they
are ingested though various paraphernalia. (Tr. 2: 68-
70.) In discussing cocaine, Sergeant Montana testified
about the use of cutting agents, noting that they
increase a dealer's supply of cocaine, but that they
reduce the quality of the product. (Tr. 2: 69.)
Sergeant Montana also explained ways cocaine ahd
marijuana can be packaged for sale. ( Tr . 2 : 7 0 - 7 2 . )
Sergeant Montana was asked a hypothetical question
in which he was asked to assume facts that had been the
subject of testimony given by Detective Hyde and
Detective Dominic Pefine. (Tr. 2: 73-76.) Sergeant
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