I need information about border agents who were imprisoned for shooting an armed drug smuggler..?

The criminal himself was granted immunity and free medical care apparently. The agents were imprisoned. One of them has already been beaten by other criminals while in prison. I want to understand how this can be happening in our nation. Who is the "judge" who did this? He needs to be prosecuted. He probably has recieved a pay off. What can I do? We need a national outrage over this!