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Michael Meiser, 40, pleaded guilty in federal court to possessing heroin with intent to distribute the drug inside the North County Correctional Facility.

Meiser carpooled with another deputy to North County Correctional Facility in Castaic.

His plea agreement does not reference the Mexican Mafia, but internal affairs detectives wrote in the report that Meiser was working with inmate “shot-callers” appointed by the prison gang to oversee rackets in the North County Correctional Facility.

Barreras is currently being held at Twin Towers Correctional Facility on $2 million bail.

Robert Lee Denis, 34, recently returned from his trip to Bronx Supreme Court back to Eastern Correctional Facility, a maximum-security prison located in Napanoch, New York.