An off-duty Rio Arriba County sheriffâs deputy and an Española man faced off in the Dandy Burger parking lot, following a road rage incident.    Española City Police Officer Dustin Chavez arrested Erik Roybal, 28, of Española, and charged him with aggravated assault, a fourth-degree felony, following the March 10 incident.    Chavez was dispatched to Dandy Burger on South Riverside Drive in regard to a man standing outside his truck with a knife. When he arrived, he saw a man, later identified as Roybal, standing next to his truck with his hands in the air. Chavez drew his weapon and advised Roybal to get on his knees, after which point, he handcuffed the man.