A U.S. Marine identified as an assailant during a white nationalist rally in Charlottesville, Virginia, has been convicted at a court-martial, and the Corps is seeking to remove him from its ranks.

A spokesman for the 2nd Marine Logistics Group at Camp Lejeune in North Carolina said in a news release that 21-year-old Lance Cpl. Vasillios Pistolis was sentenced to 28 days of confinement Monday and is being processed for "administrative separation."

The Corps had been investigating charges that Pistolis disobeyed an order or regulation and made false statements.

The spokesman said he couldn't provide further details about the charges.

The court-martial came after ProPublica and Frontline PBS reported in May that Pistolis was a member of a neo-Nazi group and bragged about violence he committed at the rally.

Pistolis couldn't immediately be reached.