That gets my vote - I think he happened across something real, just a glancing contact maybe, but it unbalanced and obsessed him, then confirmation bias and all the other usual cognitive glitches we all run (and usually have a handle on) took control of his thoughts, and tipped his little ship right over.
I based that on things like this: "On a flight home after a job interview, Odom began to suspect that strangers were sending him secret messages. Newspaper headlines had hidden meanings.
“It was blatantly obvious they were doing something to me, but I didn’t know what,” he wrote. “I had applied to several government agencies before this happened, so I thought this might be their way of contacting me.”"
If I decide someone’s sending me secret messages, I WILL acquire plenty of proof via normal processes of attention and filtering, and then the pressure and stress that investing belief in these would create, would deepen any other psychologiocal cracks, until you end up psychotic - manufacturing phenomena from a mish-mash of memories and subconscious dreads and imagery, like nightmares coming to life.
Poor dude badly needed a kitty box IMO, and just didn’t have one handy…