I would think that it did go down more like Phil said .Who else would know better and why would he change it.
The thing about Chin doing things at night have been true,but that does not mean he is sleeping till 4:00pm sounds like he was a mid morning guy like most of these guys.(and did hold guys till afternoon often)
I can not say for sure but i think that Casella may have been related to that Skipper through marriage,it is just in my head that way I am older and this is what keeps popping in my head.
But if it is not, something BIG to get a pass,for the killing of a boss is like the biggest pass one can get..