Patrik Mathews slipped over the Manitoba-Minnesota border last August 19 and was later picked by two members of the organization in MI, according to a criminal complaint filed by the U.S. Justice Department Thursday.
Mathews and Lemley were arrested in DE and Bilbrough was arrested in Maryland.
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"Within the Base's encrypted chat rooms, members have discussed, among other things, recruitment, creating a white ethno-state, committing acts of violence against minority communities (including African-Americans and Jewish-Americans), the organization's military-style training camps, and ways to make improvised explosive devices".
The criminal case against Lemley, Bilbrough and Mathews was filed under seal Tuesday; it was unsealed today after their arrests.
They have been charged with multiple firearms and immigration-related offenses and are expected to appear in a Maryland federal court later Thursday.
Dave Fitz of the FBI's Baltimore office says Patrik Mathews was one of three men taken into custody this morning.
Mathews illegally crossed the United States border near Minnesota in August, according to court papers. The Winnipeg Free Press had reported on his activities with the Base and his service in the Canadian Forces. Lemley and Bilbrough then drove from Maryland to MI to pick up Mathews before the three headed to Maryland in late August, investigators said.
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The release said the three men drove from Virginia to the Eastern Shore of Maryland where Bilbrough resided.
Lemley and Mathews then set up a residence in neighboring DE, where authorities say they started working to build an illegal assault rifle and acquire ammunition. In December, the three men gathered at an apartment that Lemley and Mathews rented in DE, where they discussed The Base and its activities and members, passed around the assault file and tried to make the drug DMT, a hallucinogen, according to court papers.
The U.S. Attorney goes on to allege that Lemley and Mathews bought 1,650 rounds of ammunition earlier this month and then "travelled from DE to a gun range in Maryland, where they shot the assault rifle" and retrieved a bulletproof vest.
It appears federal authorities had the men under surveillance, as Harrison's affidavit details their movements and quotes from their conversations.
It wasn't immediately clear who was representing the men. "Mathews also allegedly showed the assault rifle to Bilbrough, who examined the assault rifle and returned it to Mathews", the statement added.
A few days later, Lemley and Mathews bought 150 rounds of ammunition and paper shooting targets and Lemley was spotted by an Federal Bureau of Investigation agent at a gun range in Maryland.
It's alleged all three are members of the racially motivated and violent extremist group The Base, the release says. Lemley and Mathews both face federal firearms charges, the most serious of which accuse them of building a machine gun and amassing hundreds of rounds of ammunition, which they allegedly planned to bring to the rally in Virginia.
Lemley Jr is accused of transporting a machine gun, as well as transporting a firearm and ammunition with intent to commit a felony, according to court documents. Each charge carries a maximum penalty of 10 years in prison.
Bilbrough, redheaded and wearing glasses, listened as prosecutors read the charges against him, including transporting and harboring aliens.