article_snippet: FBI fingerprint examiner Elaina Graff was also called in hopes of showing that Tsarnaev did not target specific individuals with the bombs.
article_snippet: FBI fingerprint examiner Elaina Graff was the fourth witness, who testified that Tamerlan's prints were found on a transmitter, a pressure cooker lid, a jar of nails, a caulking gun, rolls of duct tape and a soldering iron, and Tsarnaev's prints were found on just on a container of gunpowder found near the scene of his shootout with police.
article_snippet: FBI fingerprint examiner Elaina Graff did state however that prints could easily be destroyed in an explosion.
highlights_snippet: An FBI photographer was called to try and prove that the brothers did not target specific individuals with the brothers placement of the bombs .
  