article_snippet: phone and iPod included writings available online from top leaders of al Qaeda.
article_snippet: phone and iPod used data mined from a GPS device and store receipts to trace the purchase of the pressure cookers, BBs and ammunition.
article_snippet: Another challenged the way FBI used GPS points and store receipts to document the purchase of pressure cookers, BBs and ammunition -- allegedly by Dzhokhar Tsarnaev.