Boston bombing suspect Dzhokhar Tsarnaev is still at large. His brother, Tamerlan Tsarnaev, died in a shoot-out with police early Friday morning. Apart from their country of origin, little is known about the brothers and their motives. A new portrait of Tamerlan comes from Anna Sale, reporter for WNYC in New York. She spoke with the former roommate of a woman who had a child with Tamerlan. Larry Aaronson, retired social studies teacher at Cambridge Rindge and Latin knows the younger brother, Dzhokhar.