Federal prosecutors filed charges against a longtime friend of Dayton shooter Connor Betts for allegedly buying the body armor, 100-round magazine and a firearm accessory used in the deadly attack that killed nine people, officials said Monday.

However, federal authorities emphasized that Ethan Kollie, 24, a resident of Kettering, Ohio, played no role in the planning of the mass shooting in the early morning of Aug. 4.

"To be clear, there is no evidence and allegation in this criminal complaint that Kollie intentionally participated in the planning of Betts' Aug. 4 shooting," said U.S. Attorney Benjamin Glassman, top federal prosecutor for the Southern District of Ohio. "I don't want that to be misconstrued."

Kollie bought the items — a 100-round magazine, a gun accessory and body armor — for Betts and kept them at his apartment so the future killer's parents wouldn't find it, officials said.

"I can say that the purchases that are at issue here were some of the equipment that was used on August 4," Glassman said.

Todd Wickerham, the FBI’s special agent in charge of its Cincinnati office, said he doesn’t know what Kollie believed Betts was going to do with all his high-powered firearms accessories.

"I can’t speak to exactly what he thought he was going to use the firearm for," Wickerham said. “But we have not found any indication that he knew he was going to conduct this attack."

Kollie was also charged with lying about his drug use on an ATF form to purchase a handgun in May.

Responding Dayton police killed Betts, 24, just outside the doors of Ned Peppers Bar, where the killer could have shot dozens more people inside, authorities have said.

Betts' victims include his 22-year-old sister Megan Betts. The others were Lois Oglesby, 27; Saeed Saleh, 38; Derrick Fudge, 57; Logan Turner, 30; Nicholas Cumer, 25; Thomas McNichols, 25; Beatrice Warren-Curtis, 36; and Monica Brickhouse, 39.

Betts' motive was not immediately clear to police.

Kollie faces up to 15 years in prison if convicted on all charges.