For those not familiar with the background to all of this, it's mostly a conspiracy theory that recently emerged with force from the UFO field.
It's not mentioned in the "real press", but the original claim was that all of these people were working on various bits of technology reverse engineered from UFOs. The MIB is cleaning up, although MIB in this case is a string of companies like Lockheed or even Raytheon.
The amusing thing is that the people on the list are not related. For instance, the "nuclear physicist and MIT professor" Loureiro worked on fusion projects at PPPL, and there is precisely zero mystery about his death, a disgruntled former colleague went nuts and shot him and other people. Yet he gets lumped into the story along with Hicks, a guy that studies asteroids, "independent researcher" Eskridge that published anti-gravity baloney, and Chavez, a construction foreman. Their only link is that the UFO hoi paloi seem to think these are related "because science".
Much of the basis for the claims of this being so strange has to do with the people simply disappearing from their home without various items like phones or wallets. This is positioned as something odd. However, this is precisely what a high school friend of mine did while suffering from mental illness, he simply walked out of the house in the middle of the winter in Canada without his prized pocket computer (this being the pre-phone era), wallet, keys or anything else, all neatly stacked on the table by the door. At the time I was told this is a common event in these cases.