"Why is he going free?"
Because they had no way to get him. They didn't know who he, no ID and was and he was in Mexico...consequently no case. If Ramos and Compean had chased him down and captured him the guy would be in San Quentin right now.
"They didn't know who he, no ID and was and he was in Mexico...consequently no case. "
Ahh so thats why they paid him off and gave him an entry card to faciliate his future drug running.