The FBI hired shady grey digital mercenaries (my apologies if I
   butthurt anyone on this list or their friends) to crack the San
   Bernardino shooter's iPhone.
   Washington Post:

     The people who helped the U.S. government come from the sometimes
     shadowy world of hackers and security researchers who profit from
     finding flaws in companies’ software or systems.
     Some hackers, known as “white hats,” disclose the vulnerabilities to
     the firms responsible for the software or to the public so they can
     be fixed and are generally regarded as ethical. Others, called
     “black hats,” use the information to hack networks and steal
     people’s personal information.
     At least one of the people who helped the FBI in the San Bernardino
     case falls into a third category, often considered ethically murky:
     researchers who sell flaws — for instance, to governments or to
     companies that make surveillance tools.
     This last group, dubbed “gray hats,”

   More:
   [1]https://www.washingtonpost.com/world/national-security/fbi-paid-prof
   essional-hackers-one-time-fee-to-crack-san-bernardino-iphone/2016/04/12
   /5397814a-00de-11e6-9d36-33d198ea26c5_story.html
--
RR
"Through counter-intelligence it should be possible to pinpoint potential troubl
e-makers ... And neutralize them, neutralize them, neutralize them"

References

   1. https://www.washingtonpost.com/world/national-security/fbi-paid-professional-hackers-one-time-fee-to-crack-san-bernardino-iphone/2016/04/12/5397814a-00de-11e6-9d36-33d198ea26c5_story.html