enlargeDzhokhar A. Tsarnaev (left) posed for a photo after graduating from Cambridge Rindge and Latin High School. Friends say they were shocked that the suspected bomber was the student they knew: The UMass Dartmouth campus closed abruptly today after school officials realized the man being sought as the Boston Marathon bomber is a student at the Southeastern Massachusetts school. On its webpage, the school posted a stark message: “UMass Dartmouth has learned that a person being sought in connection with the Boston Marathon bombing has been identified as a student registered at UMass Dartmouth.