A Grand Jury indictment from May 29, 2014 states that Matanov “deleted a large amount of information from his Google Chrome Internet cache" following the bombing, including "references to the video of the suspected bombers [later identified as the Tsarnaevs]...two of the photographs of the bombers released at approximately the same time...[and] a photograph of Officer Sean Collier, who had been allegedly killed by Dzhokhar and Tamerlan Tsarnaev.”