← All EvidenceDirectDirect Examination - William G. Gross William G. Gross Aloke Chakravarty
Video Evidence
Video surveillance supplied by the public and businesses
Gross testified that members of the public supplied surveillance footage and that businesses provided recordings from their camera systems. He said he believed more than 4,000 hours of video had been submitted for examination.
About
Gross described the public and business submissions as material police could examine in the bombing investigation, without identifying a perpetrator.