In early 2021 the Massachusetts State Police Commonwealth Interstate Narcotics Reduction Enforcement (CINRET) West Team began a lengthy investigation into a Hampden County heroin distribution operation. During the course of the investigation CINRET West identified a Holyoke residence as the point of distribution.
Shortly before 10 a.m. yesterday CINRET West joined the Hampden County Narcotics Task Force, FBI Gang Task Force, HSI Springfield, DEA Springfield, Holyoke Police Department, Springfield Police Department, Easthampton Police Department, Westfield Police Department, Holyoke Police Department, and Hampden County Sheriff’s Department in executing a search warrant at that address.
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A search of the apartment revealed approximately 29 “half packs” of heroin with an approximate gross weight of 58 grams, powder and crack cocaine with an approximate gross weight of 26 grams, two loaded magazines and numerous rounds of ammunition. The search resulted in the arrest of Yaileen Santiago-Cosme, 28. Santiago-Cosme is facing charges of trafficking heroin (36-100 grams, trafficking cocaine (36-100 grams) and possession of ammunition without an FID card.
She was transported to the Holyoke Police Department for booking on the following charges. The case remains under investigation.

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