On May 25, 2004, Lopez, along with a number of other accomplices, robbed a pawnshop at gunpoint in Sheridan, Colorado, which is part of the Denver Metropolitan Area. It is believed that Lopez was armed with a 9mm semi-automatic pistol. The suspects stole a large number of firearms, cash, jewelry and electronics equipment. Some of the store employees were assaulted during this incident. The suspects fled from the scene in a stolen SUV that was subsequently recovered. The suspects wore light blue bandannas and baseball caps to conceal their identities. It is believed that the suspects, with the exception of one white male, were all male Hispanics in their twenties.