They made that as a matter-of-fact statement. So unless you have someone, anyone in authority, claim that she was an illegal alien, I will take she was a citizen at face value.
From a BP Agent on the scene: “Typical liberal press BS, like the agent was just taking a ride on her hood for fun. She ran him down and he was EMBEDDED in her windshield. Completely good shoot. The fact that no other agents fired is because they would have hit him. We think she was there to transport a load, and she freaked when they began the warrant service.”. . .and he says she was illegal.