A man formerly convicted of manslaughter in Carroll County, Ky., pleaded guilty in United States District Court to firearms and ammunition charges last week.

Kevin Fitzgerald pleaded guilty to federal charges for possession of a firearm and possession of ammunition, including 100 rounds of 12-gauge shotgun ammunition, 100 rounds of 20-gauge shotgun ammunition and 20 rounds of .30-06 shotgun ammunition, before Senior Judge Thomas B. Russell, a release from the Western District of Kentucky for the United States Department of Justice said.

According to an affidavit, Dawson Springs, Ky., police executed a search warrant on Dec. 19, 2011, on a residence where Fitzgerald had been residing. Officers located a Ranger 12-gauge double-barreled shotgun and ammunition in the bedroom of the home, the release said.

Fitzgerald also admitted to federal authorities that he owned a shotgun and other ammunition, which were found in Warren County, Ky., search on Oct. 21, 2012.

Fitzgerald was formerly convicted of two counts of manslaughter for killing Roy and Ruby Bickers in their Carrollton home in March 1985. According to the court records, police found the couple's bodies with several wounds from a sharp instrument.

Fitzgerald was sentenced in Carroll Circuit Court to serve 40 years - 20 years for each count - in prison in 1986, but had since been released.

Sentencing for the federal charges is scheduled for Aug. 6 in Bowling Green, Ky. Fitzgerald faces no more than 20 years in prison, a fine of $500,000 and three years of supervised release.