A Libertarian activist who posted a July Fourth video of himself loading live ammunition into a shotgun in downtown Washington, D.C. was reportedly arrested late Tuesday.

Adam Kokesh's producer and roommate Darrell Young told WRC that the gun activist's home was searched by U.S. Park Police in connection with the YouTube video that shows the shotgun being illegally loaded in downtown D.C.

Fairfax County police assisted in the search and said that Kokesh was taken into custody and charged with possession of a Schedule I or II drug and possession of a Schedule I or II drug while in possession of a firearm.

"We were expecting this," Young explained. "We were expecting the Government to raid our house."

It was not immediately clear if investigators located the shotgun Kokesh was holding in his YouTube video.

"We will not be silent. We will not obey," Kokesh says in the video. "We will not allow our government to destroy our humanity. We are the final American Revolution. See you next Independence Day."

Earlier this year, the libertarian activist canceled his plans to fight "tyranny" with an armed “Open Carry March” across Memorial Bridge from Arlington into Washington. The police had warned that the march would have violated the city's gun laws.

In a statement on his Adam vs The Man Studios website, Kokesh vowed to "continue to spread the message of liberty, self ownership, and the non-aggression principle regardless of the government’s relentless attacks on our operation."

Kokesh was expected to be arraigned Wednesday morning.

Watch this video from WRC, broadcast July 10, 2013.

View more videos at: http://nbcwashington.com.