The Massachusetts State Police have arrested a corrections officer at MCI-Bridgewater after a several week-long investigation.
Stephen Lebreux, 40, of Swansea, was arrested on Tuesday afternoon and charged with trafficking heroin.
An undercover state trooper made multiple heroin purchases from Lebreux while he was off-duty and not at the prison.
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He is being held at the Massachusetts State Police Dartmouth Barrack for arraignment at Fall River District Court on Wednesday morning.