I was on Facebook and found this post shared in a group I'm in. That's my grandfather.
I could tell you a lot of stories but the most important one is that he was an undiagnosed schizophrenic. There are stories I can't even tell because I have to wait for more people to die first.
I've heard him on Coast to Coast and seen a number of interviews with him in the alien conspiracy industry. But not one of them ever mentioned, and he never volunteered, that he was an undiagnosed schizophrenic.
Remember this when you hear people speaking with authority about things they can't back up.
Controversial, but schizophrenia symptoms sometimes include seeing and hearing what others don't. For example, ghosts. If this guy was talking with ghosts, then he could know a lot of secrets since some dead have loose tongues. On the other hand, no one is stopping ghosts to be trolls and play pranks/tell lies. So, even if this guy is telling the truth, the original info source may not.
P. S. This is basically some critical thinking based on unpopular fact that ghosts do exist and that some people simply loose an ability to not see them.
If something exists then it can be measured. It does not depend on a person's ability to see.
*lose. Not loose.