From my findings Spiers' published work on Aquino isn't too revelatory outside of the known facts of the Presidio incident. He does state in an interview, however, that he believed Aquino was psychically attacking him.

All in all I think these are a lot of highly damaged individuals who could be manipulated by a particularly nefarious person or group aware to their kind of psychological issues.

It'd be curious to look into this "white brotherhood" Casbolt mentions which seems to be a sort of faction diametrically opposed to Spiers'. I feel like that whole "droned individual" list just screams hitlist.

Also, I've been trying to hold off on Monica since she seemed like the most obvious one, but I was thinking of giving it a shot next. Her case is also pretty scattered and complex, but it's one that I would be interested to see in light of the family's skepticism about suicide.