After reading the article at the link you posted it sounds like the Muslim probably put some martial arts moves on the FBI agent and the FBI agent, possible a metrosexual, had no idea how to respond physically and shot him instead.
Whatever occurred it will be shown that the FBI agent was in the right and will be fully vindicated.
Don't get me wrong. I'm not on the Muslim's side. I just know that whatever level of law enforcement that confronts you, whether they shoot your dog or you, they are ALWAYS vindicated.
agreed