I really think it was a matter of the only other person that could have taken control, Angela, being distracted. I mean, I don't think he had any power before Kaito and Linderman dying. It's like... everyone else that COULD be in charge was dead.

Which makes you wonder if he had any clue Adam was going that and letting them be taken out. And if Arthur's "suicide" was so much to control Angela and the boys, or Daniel.

I see her, this season, definitely making a play for it all.