A member of an armed civilian group that roams the U.S.-Mexico border has been charged with impersonating a U.S. Border Patrol agent.

James Benvie was named in a federal indictment on two counts of impersonating an officer or employee of the United States, according to ABC 7 KVIA.

Benvie reportedly serves as the spokesman for the Guardian Patriots, a group that split off from the United Constitutional Patriots, both civilian groups that detain migrants at the border.

The incidents in which he is facing charges occurred on April 15 and 17 in Doña Ana County, New Mexico, the U.S. Department of Justice said in a news release. If convicted, he could face up to three years in prison.

Although the release does not specify what role Benvie is accused of impersonating, the Albuquerque Journal, citing the indictment returned by the federal grand jury last week, reported that it was a Border Patrol agent.

Benvie was arrested in Oklahoma by local authorities along with the FBI last week following the indictment and made an initial appearance in court last week, according to KVIA.

The indictment makes Benvie the second member of the United Constitutional Patriots to face charges. The group was also forced by authorities to leave its New Mexico camp.