Justin King Nalls, of Milwaukee, Wis., appeared in federal court in Green Bay and pleaded guilty to a single count of being a felon in possession of a firearm.

Based on his prior record of violent felonies, Nalls qualifies as an Armed Career Criminal under federal law.

Nalls was arrested in October of 2014 for his role in the armed robbery of a Kewaunee County tavern. Further investigation linked Nalls to an additional armed robbery in Sheboygan County and a violent robbery in the City of Milwaukee. Nalls and a female associate placed ads offering prostitution services online, and then robbed at gunpoint those who responded to the advertisements. A search of Nalls' residence and vehicle yielded a loaded .44 revolver and ammunition for a .357 caliber firearm, both of which are illegal for Nalls or any felon to possess.

Based on two previous armed robbery convictions in 2005, and a burglary conviction in 2009, Nalls falls under the Armed Career Criminal Act which requires that he serve not less than 15 years and up to a lifetime in prison. He is scheduled to be sentenced on September 14, 2015. He remains incarcerated pending that hearing.

The case was investigated by the Kewaunee County Sheriff's Department, the City of Kewaunee Police Department, the Kewaunee County District Attorney's Office, the Wisconsin Department of Justice - Division of Criminal Investigation, and the U.S. Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF). This case is being prosecuted by Assistant United States Attorney Daniel R. Humble.