MARYLAND - We're learning more about a member of a white supremacist group who illegally crossed the U.S. border near Minnesota in August.
Former Canadian Armed Forces reservist Patrik Mathews is part of a white supremacist group called The Base.
According to a court document, officials believe Mathews illegally crossed the border from Manitoba into the United States.
He was arrested with two others in Maryland last Thursday.
Mathews was caught on a hidden camera expressing hope that violence at a gun rights rally in Virginia this week could start a civil war, federal prosecutors said.
The 27-year-old didn't know authorities were watching and listening.
Tuesday, federal prosecutors asked a judge to keep him detained until his trial.
In a separate incident last Friday, the Justice Department charged a Wisconsin man who they say was also a member of The Base.
That man is accused of spray painting swastikas, the group's symbol, and anti-Semitic words on a synagogue in Racine, Wisconsin.
The Associated Press contributed to this article.