At the end of the shooting on the highway, a hooded person dressed in dark with a Mexican flag tag and a baseball cap with what looks like a police star (but seems to have six points rather than the Mexican Federal Police seven points)shoots at Kate and misses.
Is the role and goal of that person known? Was it a police officer who mistook the American soldiers as cartel members (and for some suicidal reason decided to engage)? Was it a member of the other cartel gunmen disguised in a police uniform?
Am I correct about the star's point count? Is it a different police branch or did the film makers just get the costumes wrong (It looks like Silvio's uniform also has a six-point star tag)?