Let me put it to you another way. New guy turns up, starts printing off a whole bunch of highly classified docs that don’t relate to his actual job and then suddenly has to leave due to a vague “family illness”.
He is basically a walking profile of insider threat behaviour modeling.
I don’t think it was anything other than his stupidity that put him on the radar so quickly. Reading the indictment it’s clear he was a bit of an idiot.