The FBI on Saturday said it had arrested Larry Hopkins, the leader of an armed group that is stopping undocumented migrants after they cross the U.S.-Mexico border into New Mexico.
The arrest came two days after the American Civil Liberties Union (ACLU) accused the group of illegally detaining migrants and New Mexico's Democratic Gov. Michelle Lujan Grisham ordered an investigation.
Hopkins, 69, also known as Johnny Horton, was arrested in Sunland Park, New Mexico, on a federal complaint charging him with being a felon in possession of firearms and ammunition, the Federal Bureau of Investigation said in a statement.