Tech to put voices in your head:
https:// en.wikipedia.org/wiki/Microwave_auditory_effect
Gunman in florida school claims voices in his head told him how to pull off shooting.
http:// www.dailymail.co.uk/news/article-5398625/Demon-voices-school-gunman-attack-cops-called-39-times.html
US Army Voice To Skull program
https:// www.wired.com/2008/05/army-removes-pa/
Thoughts?