Those demon voices were no other than the deep state FBI.
https://www.google.com/amp/s/www.wired.com/2007/06/darpas-sonic-pr/amp
DARPA has a device that sends voices that only you can hear.
Sound crazy?
An FBI agent urged the Draw Mohammed shooter to “tear up Texas” and then drove him to the location. Tucker Carlson had a show about it.
My brother in law hears voices from the FBI all the time. When it gets out of hand, the police take him into the hospital where he gets to stay for a week or two.
https://www.youtube.com/watch?v=w-0TEJMJOhk
Protect yourself, quick!
There is also the “Voice of God” technology that the military uses. See a short video of it’s use on this link: https://youtu.be/1pefJgkG0lw
What MNDude said... Let me add to the story.
There are more than one way to “speak” into your cranium. It was supposed to be used to get the enemy (primary target was muslim fighters) to lay down their weapons and get others to do the same. But the CIA Deep State got hold of one or more versions of it and has used it for nefarious purposes. They generally choose people that already have “issues” and amplify them and direct them to do the dirty deed. The primary effort has been an attack on the 2nd amendment, but there have been several uses for false flag and media diversionary attacks. Expect this to ramp up as Nov 2020 approaches. A patsy with no fingerprints; a CIA dream.
The CIA secret ops have had lots of time and lots of money perfecting things we probably have no inkling about.