An internal DHS document shows CBP used location data sourced from the online ad industry to track phone locations; ICE has bought access to similar tools (Joseph Cox/404 Media)

Joseph Cox / 404 Media: An internal DHS document shows CBP used location data sourced from the online ad industry to track phone locations; ICE has bought access to similar tools  —  Customs and Border Protection (CBP) bought data from the online advertising ecosystem to track peoples' precise movements over time …