Amir Ismagulov, father of Kazakh student, Azamat Tazhayakov (Photo: Andrea Crossan)

Two students from Kazakhstan remain in prison on charges of obstruction of justice in the Boston marathon case. They're accused of conspiring to destroy, conceal and cover up objects belonging to their college classmate, suspected bomber Dzhokhar Tsarnaev. The World's Andrea Crossan tells anchor Marco Werman about her conversation with the father of one of the students, who came from Kazakhstan to Boston to support his son.

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