After Monday's tragic events at the Boston Marathon—where two bombs went off, leaving three dead and over 130 people injured—it was revealed yesterday that Tamerlan and Dzhokhar Tsarnaev (who are brothers) are believed to be the suspects. Last night Tamerlan was killed in a shootout with police, but Dzhokhar, the younger brother, remains on the loose. One thing that has been found, however, is his Twitter account (not to be confused with the two fake accounts that have popped up). It paints a perplexing portrait of the 19-year-old suspect.  But who exactly he is, and what pushed him to such extreme measures, we may never know.