I'm in San Diego and I've followed this case from the get-go. Given past problems with evidence in Dumanis' office, the upcoming elections, and the players' ability to lawyer up, I really do think LE was scrupulous in this case. I would NOT typically say that.
As improbable as it sounds, at this point I really do think RN was a suicide. By that point in the evening it was likely clear that MS was beyond hope. (Local gossip had MS brain dead the day of the accident, but I state this as hearsay and I'm not saying it is fact.) My gut tells me that JS broke up with her at some point during the night. Probably by phone, text or email. I honestly do not see a parent leaving the child's bedside. I'm sure JS wasn't too nice, it that indeed happened. I imagine an incredibly vicious verbal attack. In this vulnerable and distraught state, RN could have committed suicide in a very public way which would cast suspicion on him.
If this was a hit, it would have been cleaner. It would have performed in a far different manner, one which would not in any way cast suspicion on anyone else.
As to the bar mitzvah photo. I see the key players as very strained. This was not a candid photo -- the photographer posed them (I've been to many such events). That JS stood in the back, and wasn't in the seat where GS was sitting, says a lot. It tells me the relationship between KJ and JS isn't too cordial even years after that acrimonious divorce.
Just some thoughts as we wait for tomorrow. And yes, it'll be suicide. If it were otherwise, there wouldn't be the dog-and-pony show.