You could be right although I can’t think of any single message positioning of bodies would reveal beyond the horror of death itself.
Why I lean towards a staged suicide or staged murder/suicide was intended to not pass close scrutiny, a couple reasons...
Just prior to the Sherman murders, there were a couple of other wrongly ruled Ontario cases that suddenly came to light, only deemed to be murder because the perps later drew suspicion to themselves. One was an almost unbelievable, horrific case involving the murder of Caleb Harrison and in turn the earlier deaths of both of his parents.
Mississauga mom and her spouse found guilty of first-degree murder in killing of ex-husband | The Star
The other example of course is Wayne Millard’s death, originally ruled a suicide. Maybe these examples just happened to come to notice coincidently but it sure makes me wonder how many other murders are being written off as suicide or accidental death, either due to shoddy investigation, overworked police forces, poor training or purely because no evidence of foul play was found.
I’d never heard of suicide by hanging by a belt until the death of Robin Williams when it was splashed all over by the media. I recall a huge amount of curiosity about it at the time. Up until then, I had absolutely no idea hanging could occur without feet dangling off the ground. I’m not familiar with the movie referred to that RW acted in, where this manner of suicide was used, but I think it’s fair to say most people would definitely associate suicide by belt to Robin Williams because of the high level of media reporting about it.
Robin Williams’ death: Iconic comedian’s death officially ruled suicide
Robin Williams was also close to the same ago as the Shermans as well. (Were the Shermans fans? In that same age group, chances are, or maybe it’d be presumed?). In staging a suicide with belts, was it thought the same method would pass scrutiny, not requiring a great deal of physical agility, perhaps originally intended for their murder to be perceived as a peaceful togetherness death pact? I just wonder.