I did not watch the service, but I did read some quotes from the adult children, and a brief news-clip. I do feel for them: it must be incredibly difficult and traumatic to lose not just one, but both parents, so suddenly and under such alarming circumstances.
At the same time, I am mystified as to why they held a funeral service for six thousand. I don't think heads of state have so many people on the attendee list. (Princess Diana's funeral had two thousand, I think - obviously millions around the world watched on television.) Why not have a regular, intimate service for a much smaller audience of truly close family and friends? Startling to see that kind of spectacle.
Anyway, aside from the above, I am not sure if this has been earlier discussed, as I simply cannot read through all 96 (!) pages of this thread, but I think what is of more interest beyond whether there had been "signs of forced entry", is whether or not all doors/windows/any possible exits of the house were secured upon discovery. If so, that makes things quite interesting... If it was a double-murder, the perpetrator(s) would have had to have either locked the door behind them, or perhaps, if there was such a thing installed, the door would have had a mechanism to lock automatically upon closing. I know someone who has that installed on their door. But if there was no such mechanism, that means there is someone who had a key - whether they had obtained one through the Shermans providing one to them voluntarily, or had surreptitiously obtained one - OR they took it from the Shermans after they died.
Obviously, we will not know this answer, and many others, for some time (if at all), but to me that is worth pondering.