A friend of the gunman in Ohio has been charged with lying on federal firearms forms, the Justice Department has said.
The charge comes just over a week after the mass shooting where 24-year-old Connor Betts opened fire in a popular entertainment district, killing his sister and eight others.
Ethan Kollie bought his friend body armour, a gun accessory and ammunition earlier this year, according to the charging document.
He kept the items at his apartment so Betts' parents would not find them, it said.
Prosecutors have unsealed the charge against Kollie that accused him of lying about not using marijuana on federal firearms forms in the purchase of a pistol that was not used in the shooting.
Police have also said there was nothing in Betts’ background that would have stopped him from buying the AR-15 style gun that he used.
The weapon was bought online from a dealer in Texas and shipped to another firearms dealer in the Dayton area, police said on the day of the shooting.
Investigators have not released a motive.
Officers shot Betts within 30 seconds of him opening fire, killing him just steps away from a crowded bar.
Authorities have said hundreds more people may have died had Betts got inside.
Eight of the victims who died were shot multiple times, according to the Montgomery County coroner's office.
More than 30 others were left injured, including at least 14 with gunshot wounds, hospital officials and investigators said.
Just days after the shooting, Ohio Republican governor Mike DeWine announced a package of gun control measures, including requiring background checks for nearly all gun sales in Ohio and allowing courts to restrict firearms access for people perceived as threats.
