Tsarnayev's friend accuses suspected terrorist of propensity to violence

Azamat Tajayakov, a Kazakh student, said that Dzhokhar Tsarnayev, one of the suspected organizers of the Boston Marathon blast, had propensity to violence. Dzhokhar and his brother Tamerlan knew how to build a bomb and get weapons, as Dzhokhar told Tajayakov the previous year, Interfax reports.

Tajayakov believes that Tamerlan brainwashed Dzhokhar with radical Islam.

Prosecutors told the jury that Tajayakov was searching the Internet about Tsarnayev and his terrorist attack on April 18-19, 2013. FBI agent Farbod Azad said that Tajayakov had been using pronoun "we" during questioning about his bag and Tsarnayev's computer thrown out.