FBI Arrests 18-Year-Old Who Makes Online Threat, Finds 25 Guns and 10,000 Rounds of Ammo

The seal of the F.B.I. hangs in the Flag Room at the bureau's headquaters March 9, 2007 in Washington, DC. Chip Somodevilla/Getty Images

An 18-year-old Ohio youth was arrested after he made online threats to shoot federal law enforcement officers.

After a 6-month investigation into Justin Olsen, FBI agents reportedly found 15 rifles and shotguns, ten pistols, camouflage attire, and 10,000 rounds of ammunition in his bedroom, Fox News reported.