COEUR D'ALENE, Idaho -

A man who, at least at one time, lived at the same address as Coeur d'Alene murder suspect David Hutto has been arrested and is being held on a federal charge of unlawful possession of a firearm.

According to federal court documents, Justin Booth was arrested over the weekend and appeared in court Monday in Coeur d'Alene. While not directly implicating Booth in connection with Kirk's death, it does lay out how investigators found him in possession of a gun; he is a convicted felon and is not allowed to have firearms.

The federal paperwork shows Booth was questioned Friday night by the North Idaho Violent Crimes Task Force and the Kootenai County Sheriff's Office. It says he waived his rights before being questioned.

In the interview, Booth told investigators he runs a small engine repair shop. He says someone came to him on Oct. 15 and wanted to buy mopeds. The information that follows is redacted, but Booth admits agreeing to trade the mopeds for a .38 caliber revolver. He admitted that the gun was still in his possession.

The Kirk case is under judicial seal, so no one is allowed to comment on the facts of the investigation. But, a public records search shows Booth and Hutto have both lived in the same home on Miles Road in Hayden.

Investigators searched Booth's home Friday and found the gun. The paperwork does not indicate what type of gun was used to kill Kirk or if they believe this is the murder weapon.

That same day, investigators were searching a home on Miles Road. Several hours later, they announced two men had been arrested for Kirk's murder. The only one publicly named so far is David Hutto, who is charged with murder and being held on a $2 million bond.

Booth is charged in federal court and is being held in the Bonner County Jail.