The two biggest red flags to me are AS appearing to want to convey the conclusion that RN had killed herself & AS's less than stellar polygraph results. Why didn't LE ask him to take another polygraph?
As for AS texting JS, AS is well aware of being the brother of the CEO of a large corporation, he may have been thinking that the news of this incident would travel quickly & that JS needed to know ASAP, before it became a media event. Isn't it possible that AS attempted to reach JS & JS was in the shower & didn't answer? AS would then feel he had no choice but to send the info via text to make sure that JS was informed before the media started asking questions. The same would be true of JS calling DS, even though he would see her in a matter of minutes. News like this spreads like wildfire when it involves a prominent person such as JS.
On Sunday's radio show, Dr Cyril Wecht emphasized how odd it seemed that RN could tie such intricate knots & bindings even though there seemed to be no evidence that she had ever done so previously. Now we hear that AS's polygraph was inconclusive. Also, does anyone remember if there is a record of AS being informed or receiving a message of MS's prognosis that same night when RN got the cell phone msg? If AS didn't know the grim prognosis there wouldn't be much reason to suspect he would do anything to RN. IMO.