(STMW) — A Elwood gun dealer was sentenced Wednesday to four years in prison for selling nearly a dozen firearms to buyers who were not legally allowed to purchase the weapons.

Patrick S. Keiran, 41, pleaded guilty in April to one count of selling a firearm to a prohibited person. In addition to the four-year prison term, Kerian was imposed to three years supervised release, according to a statement from the U.S. Attorney’s Office.

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Keiran, a federally licensed firearms dealer since April 2013, sold 11 weapons to an undercover officer who told Keiran he couldn’t pass the required background check and a convicted felon, according to the statement.

On May 29, 2014, Keiran sold three 9mm handguns for $960 to the undercover agent from the Bureau of Alcohol, Tobacco, Firearms, and Explosives. The following month, Keiran sold the undercover agent a .38-caliber revolver for $398.43, and two .22-caliber rifles for approximately $1,390, according to the statement.

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On June 20, 2014, Keiran sold five 9mm handguns for $1,600 to the convicted felon, who was cooperating with law enforcement, according to the statement.

In both instances, Keiran doctored the bill of sale and the federal firearms paperwork by using the names of other customers. The sales were conducted in his Elwood home, according to the statement.

Keiran was arrested in July 2014, and his gun store was closed.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2015. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)