article_snippet: The bicyclist, MIT mathematics Ph.D. candidate Nathan Harman, pointed to admitted Boston Marathon bomber Dzhokhar Tsarnaev in court and identified admitted Boston Marathon bomber Dzhokhar Tsarnaev as the man with "a big nose," who admitted Boston Marathon bomber Dzhokhar Tsarnaev saw leaning into Sean Collier's squad car.
article_snippet: Harman, the grad student on the bicycle, often used the word "Harman, the grad student on the bicycle" in his testimony at first, but said his saw just one person as his pedaled past.
article_snippet: Asked to describe who his saw, Harman added, "I remember thinking his had a big nose.