article_snippet: The video - nine and a half minutes in total - was compiled by FBI investigators from surveillance footage around the city.
article_snippet: Tamerlan Tsarnaev's defense attorneys cross-examined a witness who said the time stamps on the Whole Foods CCTV was approximate, but prosecutors countered that with a receipt of Tamerlan Tsarnaev's purchase confirming the time for that day was correct.
article_snippet: Tamerlan Tsarnaev's lawyers cross-examined a witness who said the time stamps on the surveillance video were approximate, but Whole Foods provided a receipt for Tamerlan Tsarnaev that proves Tsarnaev's lawyers were correct on that day .