Ummm, this is a pretty fucked up series of incidents with people who have very high security clearances and access to sensitive info from related fields.

This isn't exactly a "mystery", they're obviously being killed to stop or slow their research. The only mystery is who exactly and how.

Remember that "UFO" research is essentially military intelligence.

I misread "mystery over" as "mystery solved" instead of "mystery about".

Holy cow is this messed up.

Three Body Problem irl?

Very weird.