Prosecutors portraying accused Boston Marathon bomber Dzhokhar Tsarnaev as a cold-hearted killer have pointed to his Twitter accounts to help back the claim.
Tsarnaev allegedly tweeted from two Twitter accounts.
A screenshot of part of accused Boston Marathon Bomber Dzhokhar Tsarnaev's Twitter account.
Prosecutors portraying accused Boston Marathon bomber Dzhokhar Tsarnaev as a cold-hearted killer have pointed to his Twitter accounts to help back the claim.
Tsarnaev allegedly tweeted from two Twitter accounts.