Justice Department reveals cartel hacker compromised FBI attaché's phone data and used city surveillance to eliminate witnesses, the DOJ said.

The Department of Justice report said the hacker identified an FBI assistant legal attaché at the U.S. Embassy in Mexico City and was able to use the attaché’s

The Sinaloa drug cartel in Mexico hacked the phone of an FBI official investigating kingpin Joaquín “El Chapo” Guzmán as part of a surveillance campaign “to intimidate and/or kill potential sources or cooperating witnesses,