The leader of the far-right Proud Boys pleaded guilty Monday to burning a Black Lives Matter banner taken from a historic Black church during a demonstration in December, reports NBC News.

Enrique Tarrio, 37, of Miami, was arrested Jan. 3 in Washington, D.C., on a warrant stemming from the Dec. 12 incident. The Proud Boys and other groups marched in a raucous pro-Trump rally through downtown Washington. The banner was stolen from the Asbury United Methodist Church, one of the oldest Black churches in the area.

On top of the destruction of property charge, he also pleaded guilty to attempting to possess a high-capacity gun magazine, which is illegal in the city. Both charges are misdemeanors, punishable by up to six months in jail. He will be sentenced next month.