What are your thoughts, have you consulted some AIs.. yet? what did they say?
Did you ask Ais, what did they say?
https://www.researchgate.net/figure/The-Audio-Spotlight-deve...
https://patents.google.com/patent/US7391872B2/en
https://www.hackster.io/news/new-speaker-tech-beams-private-...
Consider 1, reading minds. If there was any tech that was any better than lie detection ... a scanning type system that was even good enough to hint at a rough notion of non conforming ideas [b] within minds -it would have been used and within the present government agencies and government, there would have been large changes in the power structure - more than anything reported so far.
By 2, remove memories - I have assumed specific / particular things, otherwise broadly, brain trauma and some drugs will do that.
[a] - rise of flat earth beliefs ... magnetism can be disrupted / dissolved with water ...
[b] and not intent by asking the right questions while under observation