A video of a Border Patrol agent shooting Ramiro Gamez Acosta,a Mexican national, has angered the Mexican government and led to calls for an investigation. The Border Patrol is claiming that the shots were fired in self defense. It does look like the Border Patrol officer was being threatened as it appears Acosta was about to hurl something at the officer, but I'm no expert and will be interested in what others have to say. You can see the video here.