A hacker working on behalf of the Sinaloa drug cartel infiltrated cameras and phones to track an FBI official in Mexico investigating the drug lord El Chapo, then used data from that surveillance to kill and intimidate potential sources and witnesses the agent was meeting with. The hacker had observed people going in and out of the US Embassy in Mexico City and identified "people of interest" for the cartel, including the FBI Assistant Legal Attache (ALAT), and then was able to use the ALAT's mobile phone number to obtain calls made and received, as well as geolocation data, associated with the ALAT's phone. Link: justice.gov.
