Ah, but alien abductions are a cover-story for CIA-sponsored child abductions, organ harvesting, and illegal human experiments. Spiers could have began as a true believer in the "space alien" disinfo, but was getting too close to uncovering the the truth about it, or to the players involved in it, for his own good. Woudn't be the first time someone died under mysterious circumstances over this.

The whole "Alien abduction" phenomenon is really about the millions of children that go missing every year since the 1970s and that the media stopped talking about around the mid 90s. It's a psyop meant to confuse people as to the true nature of the problem. If you get too close to the heart of things, and figure out it's not really about little green men from Mars, you end up being killed or "suicided".