I mean, I have no idea about that specific guy... but it would not surprise me if he was telling the truth.

I have also met people like that, way too well spoken and giving highly detailed and accurate information... and I myself have also personally seen things that, every time I describe them specifically in detail, nearly everyone dismisses me as insane.

The US absolutely has and almost certainly still is doing research into all kinds of mind control, psy ops, all that kinda stuff... hooray MKULTRA... and the US also does just publically use dolphins.

... And the military also has intentionally driven insane at least one independent investigator near Area 51 who stumbled onto radio signals from actual experental test aircraft, but they told him basically 'dang, it could be aliens!' and gaslit him for decades: Paul Bennewitz.

https://en.wikipedia.org/wiki/Paul_Bennewitz

There are CIA documents showing that two agents orchestrated a disinformation campaign against Bennewitz specifically, and both of these agents just actually publicly stated as much.

...

As for the 'insane' shit I have personally seen/heard:

I used to do contract V Dash work at MSFT, and another, much older contractor told me that before the Gulf War, he was once part of a team stationed in Saudi Arabia that executed what is now called a 'supply chain attack':

They got a hold of computer hardware that was destined to be used in the Iraqi air defense system, and they basically flashed a custom BIOS onto the stuff, such that when Operation Desert Shield transitioned into Desert Storm, ... well, now that compromised computer hardware has been delivered and installed into the Iraqi air defense system, so now the US knows exactly where many Iraqi SAM and radar equipment physically is for precise targetting, and they could even just remotely scramble or disable the systems.

Think Stuxnet before Stuxnet, but not malware that infected hardware from a remote internet source... instead, the malware came pre-bundled with the hardware that was unknowingly installed into the computer network.

...

I have also, twice, seen a very large, silently hovering equilateral triangular craft, which the 'ufo community' seems to call the TR-3B.

It is in roughly in line with some of those US Navy patents from that were published several years back that caused quite a stir at the time.

https://www.sandboxx.us/news/airpower/what-is-the-legendary-black-triangle-ufo/

What I have seen twice now matches the admitidely hillariously shitty image in this article.

I've once seen it high above, hovering motionlessly, silently, high above Seattle, and it looks like that image...

And I have also seen it hovering less than a hundred feet over a large hangar style building that is part of Boeing Field at the south end of Seattle...

It is roughly the same size, slightly smaller, than the building marked 'Fly Away Cafe' on google maps, which is literally across the street from the Boeing Military Delivery Center... it was hovering 100 feet or less over this building, and I was looking at it while crossing the West Seattle bridge.

I am not claiming I know anything about how this thing works at an engineering or technical level, I am not a former engineer or scientist or anything, I am just saying I have seen this thing.

If I had to guess, it seems more likely to me it is an experimental craft that is 100% human in origin, a classfied US experimental craft, not some kind of alien mothership.