The brothers have substantial presences on social media. On Vkontakte, Russia’s most popular social media platform, the younger brother, Dzhokhar, describes his worldview as “Islam” and, asked to identify “the main thing in life,” answers “career and money.” He lists a series of affinity groups relating to Chechnya, and lists a verse from the Koran, “Do good, because Allah loves those who do good.”
One former schoolmate of Dzhokhar Tsarnaev at Cambridge Rindge and Latin School in Massachusetts described him as “very sweet,” adding, “I never heard anyone say a bad word about him.” Another, Meron Woldemariam, 17, the manager of the school volleyball team that Mr. Tsarnaev had played for, said that he had left the team in the middle of the season to wrestle. She described him as normal — sociable, friendly and fun to talk to. He was a senior when she was a freshman.
The older brother left a record on YouTube of his favorite clips, which included Russian rap videos, as well as testimonial from a young ethnic Russian man titled “How I accepted Islam and became a Shiite,” and a clip “Seven Steps to Successful Prayer.”