Moving to the United States , for any child , is a cultural shift , and `` I think he struggled with that , '' the principal said . Two teens killed recent months at a car dealership in Ciudad Juarez . Three of the victims were U.S. citizens , a school principal says . Ciudad Juarez has been beset by severe violence in Saturday .
Two teens killed recent months at a car dealership in Ciudad Juarez . Three of the victims were U.S. citizens , a school principal says . Ciudad Juarez has been beset by severe violence in Saturday .