Many years ago, I heard about Mr. Costello while reading the wild and crazy Dulce papers. The Dulce papers are amazing stuff based around the premise that the aliens have underground bases in various locations around the world, including one of the most famous ones called the Dulce in far northern New Mexico.
Thomas Costello is most likely a factitious name of a security guard who saw some interesting things as he guarded the underground facility in the Dulce area. He claims Dulce is an underground hub of alien being activity in the western US.
I would probably agree with that statement because of my conversations with construction workers who worked on building tunnels going in various directions out from Sandia Labs, Kirkland AFB and from Los Alamos National Lab. These workers have also seen glimpses of strange beings moving about in these tunnel systems.
Thomas has said that Dulce was started in the late 30’s by Army Engineers; I have personally heard that the starting dates were more like the late 40’s because of our atomic bomb activity, and the alien interest in our genie in the bottle release. and the destruction of thousands of human souls. I also believe we had to agree on underground accommodations for the aliens “or else.”
Costello also talks about tunnels from New Mexico connecting to Mt. Shasta where it is rumored that the mountain is the home or was the home of an Elder/Reptilian race. This statement also seems to hold water, for I have had personal communication through meditation on Mt. Shasta several years ago, with some alien group.
Thomas also talks heavily about Reptilian activity in and around Salt Lake City and possible Mormon connection. Although I agree there is some pretty strange stuff going on in Utah, I worked with Mormons in the Salt Lake area for several years and never felt they (Mormons) had direct involvement with any alien groups.
If Thomas Costello is real or not, he sure told an interesting story of what might be. And I can confirm not all his conversations are sheer folly.
Sleep tight, one path of conspiracy is truth.