A 48-year-old Guilford man was sentenced Tuesday to 21 months in prison to be followed by three years of supervised release for distribution of heroin and oxycodone.

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Willie Harper, pleaded guilty to the charges on June 1, 2016.

According to court records, on August 13, 2015, Harper sold a quantity of heroin to an undercover law enforcement officer at a location in Guilford, Maine. Two weeks later, Harper sold the undercover officer ten oxycodone pills at a different location in Guilford.

In imposing the sentence, Judge John Woodcock noted that Harper had contributed to Maine’s ongoing heroin problem and that Harper has “a horrible criminal record.” Harper’s criminal record includes felony convictions in Illinois for armed robbery, unlawful use of a weapon by a felon, and unlawful delivery of a controlled substance, and in Maine for sexual abuse of a minor.

The investigation was conducted by the Drug Enforcement Administration and the Greenville, Maine Police Department.