As you probably know three of Dzhokar Tsarnaev's buddies from UMass-Dartmouth were arrested and charged today with obstruction of justice charges and making false statements to the authorities.
It is alleged that the three men (two from Kazakhstan and one American born) hid evidence following the bombings. Apparently, Tsarnaev told them that he knew how to had build a bomb a month before the attacks.
Two questions. Did they know of Tsarnaev's plans? Or did they in some way assist him in carrying out the plot?
Which brings up a third question. Is there anyone else involved?