More likely, he discovered the government's MKUltra involvement in the fake psyop abductions.
Being a victim himself and ending up dead. Maybe no such agency has his laptop contents.
Which seems more probable?
And if you look at what the victims remember and report (after their memories are manipulated and fucked with, MKUltra style) it doesn't reconcile with ET fanatics pushing the line, they don't interfere, they don't harm, they're here to help us, etc.
That's a major contradiction.
These people are harmed, and he's dead. And seriously, the witnesses have memories of some sort of tampering with their sexual parts. Sounds more like the evil humans. And this guy, Mkultra soldier, trying to find out who's fucking with everybody.