A Boardman man now faced with a federal charge of threatening to assault a federal law enforcement officer used the screen name "ArmyOfChrist," and was found with assault-type rifles and 10,000 rounds of ammunition when he was arrested, according to authorities.

Justin Olsen appeared in U.S. District Court on Monday after a federal complaint was filed just five days after Olsen was arrested at his father's Oakridge Drive home in Boardman.

Authorities say Olsen ran an online chat room that made threats about shooting up a gay bar, planned parenthood, and federal agents, according to a police report.

According to an affidavit filed by the FBI, Olsen posted on the chatroom “iFunny” under the identity “ArmyOfChrist” with 4,400 subscribers.

The affidavit states that on June 2, when ArmyOfChrist engaged in a conversation with another user regarding the 1993 siege in Waco, Texas, ArmyOfChrist posted “In conclusion, shoot ever federal agent on sight.”

The Waco siege was a 51-day-long confrontation between state and federal authorities at a ranch compound belonging to the Branch Davidians religious sect.  When the FBI launched an armed assault on the compound, six members of the sect died as well as four government agents.  A fire broke out during the attack, killing 76 members of the Branch Davidians.

The FBI says a further review of ArmyOfChrist found posts that stated, ”… don't comply with gun laws, stock up on stuff they could ban. In fact, go out of your way to break these laws, they’re f--king stupid,” and “Hell, even the Oklahoma City bombing shows that armed resistance is a viable method of political change. There is no legal solutions” and “In conclusion, shoot every federal agent on sight.”

Agents said when they interviewed Olsen after his arrest, he admitted making a comment about shooting Federal Agents, telling the FBI it was only a joke.

Police and FBI agents say they confiscated a computer, iPad, and an iPhone. Agents also confiscated approximately 10,000 rounds of various ammunition, camouflage clothing, camouflaged backpacks, and a large gun vault which was found in Olsen's residence as well as about 15 rifles including, assault-type rifles, shotguns, and about ten semi-automatic pistols. 

According to the police report, the Anchorage, Alaska office of the FBI began investigating in February when it found several posts in the chat room making light of mass shootings targeting Planned Parenthood.

Agents traced the chat room to Olsen's address in Boardman, which was on Presidential Drive at the time.

The FBI says a posting in June stated: “can't wait to start stockpiling weapons.” Additionally, agents say Olsen has admitted writing “shoot every federal agent in sight” in response to a comment from one of the chat room users.

The following day, according to the FBI, a screenshot of an AR-15 assault rifle parts kit was posted on the chat room, along with comments that a person, who's name is redacted from the report, may purchase the gun kit the next day.

The report says Assistant Mahoning County Prosecutor Michael McBride decided on Tuesday that they couldn't wait to act on the information because of the recent mass shootings in the United States.

When police didn't find Olsen at his Presidential Drive home, they later spotted him in the driveway of his father's Oakridge Drive home, where he was arrested.

Olsen is scheduled to appear again in Federal court on Friday.

Olsen also faced local charges of aggravated menacing a police officer and telephone harassment filed in Mahoning County Court Those charges were dismissed after the Federal complaint was filed