The student visa process has come under scrutiny after investigators in the Boston bombings learned that a friend of suspect Dzhokhar Tsarnaev entered the U.S. with an expired student visa.
Azamat Tazhayakov, a student from Kazakhstan, was arrested on suspicion of obstructing justice after investigators say items were removed from Tsarnaev’s University of Massachusetts, Dartmouth dorm room three days after the attack.
