This article from today's Washington Post discusses the case of a Border Patrol agent who shot and killed a Mexican teen who was standing on the Mexican side of the border. Allegedly the teen and his friends were taunting and throwing rocks at a group of agents, and one agent shot and killed the boy in response.
This is a terrible tragedy. I understand that there must be an incredible amount of attention on the border right now. Nevertheless, as a nation we cannot allow this type of behavior under any circumstances.