article_snippet: There is surveillance video of Dzhokhar and Tamerlan Tsarnaev visiting a gun range in Manchester on March 20, 2013.
article_snippet: A video shows Dzhokhar (right) and Tamerlan (left)
article_snippet: Tsarnaev visiting a New Hampshire gun range in 2013 .
article_snippet: Surveillance video captured Dzhokhar and Tamerlan driving and parking up at a New Hampshire gun range about a month before the attack .
article_snippet: The aftermath of the shootout, where Tamerlan was killed, saw empty packets of bullets left on the street and casings on the ground .
article_snippet: Tamerlandied in the shootout, where Tamerlan was killed after being shot multiple times and run over by Tamerlan brother.
article_snippet: Dzhokhar's lawyers claim Tamerlan shot Collier and used the gun during the shootout, where Tamerlan was killed.
article_snippet: In addition to Collier, the brothers are accused of killing restaurant manager Krystle Campbell, 29, graduate student Lingzi Lu, 23, and eight-year-old Martin Richard.