I think the reason he did what he did to Hunter boils down to plain old human emotions, and I know sociopaths/psychopaths don’t generally have those kind of thoughts, especially empathy, but they DO have egos & it’s quite often their undoing, to let people see what they’ve done, to ‘get the credit’ they love their egos bring stroked and Hunter had more than he did, he did it better & had it better, and he was just plain old jealous.

