GREENBELT, Md. (AP) — A former Maryland state delegate convicted of accepting bribes to advance liquor sales has been sentenced to 48 months in federal prison.

The Washington Post reports 60-year-old Michael L. Vaughn was sentenced on conspiracy and bribery charges Tuesday.

Prosecutors said Vaughn took more than $15,000 in exchange for advancing two bills regarding Sunday liquor sales permits, which both became law in recent years. He was among seven arrested in "Operation Dry Saloon," which also snared liquor store owners, lobbyists, former liquor board commissioners and former Prince George's County Council member William A. Campos.

Vaughn was the only defendant who took his case to trial. His lawyers said he accepted bundles of money believing they were campaign donations, not bribes.

Vaughn expressed his "sincerest apologies" to his family and constituents Tuesday.

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Information from: The Washington Post, http://www.washingtonpost.com