The Justice Department announced Friday that they have arrested 18-year-old Gabriel Agard-Berryhill for allegedly throwing a "large explosive device" at a federal courthouse during violent protests in Portland this week.
"I bought the vest for him after he found one online after getting hit with rubber bullets the night before at the protest," Fox told the Post.
Fox told the Post that she was unaware that her online postings helped authorities identify her grandson as the alleged perpetrator of the explosion.
"No legitimate protest message is advanced by throwing a large explosive device against a government building.
Mr. Agard-Berryhill's actions could have gravely injured law enforcement officers positioned near the courthouse, other protesters standing nearby, or himself," U.S. Attorney Billy Williams said.