Could it be, the Police never did believe it was M/S, and set up a stream of dis-information through the media?
The TPS never did make any official statements until they declared it a murder investigation. All the information about M/S were media reports attributed to unknown Police sources.
With all the talk of M/S maybe the TPS was hoping the criminals would be lulled into a false sense of complacency and trip themselves up.
For this scenario to be true, we have to assume the TPS is quite sophisticated, even though there maybe historical evidence to the contrary.
If it was a planned ruse, at this time, it does not seem to have been effective.
MOO
I kinda see it this way, but I don't agree with the idea of a 'stream of disinformation'.
There appears to have been one police source that initially said police were investigating it as a murder-suicide. You see this in the first few pages of thread number 1, essentially pages 4-6. All 3 Toronto papers published this rumour on Dec 16, the day after the bodies were found: for eg, The Star
"Officially, Toronto police have released little information about the deaths, beyond that they were deemed suspicious. But police sources confirm to the Star that police are now probing the possibility that they were a murder-suicide."
The bodies of Barry Sherman and his wife Honey were found in their North York mansion just before noon Friday.
www.thestar.com
Then, of course, it started to go viral. The Daily Mail, etc, don't independently verify anything, they just copy the story from other media.
However, the very same day, the family released a statement that they didn't believe the theory, and strongly objecting to the media publishing the rumour, as well as that police source for spreading them.
TORONTO, Dec. 16, 2017 /CNW/ - Our parents shared an enthusiasm for life and commitment to their family and community totally inconsistent with th...
markets.businessinsider.com
At that point, ie, the day after their bodies were found, all rumours stopped. The police went through their process of investigation, the autopsy went ahead, etc.
IMO, like proper police, they neither jumped to the conclusion of m-s, nor jumped to the conclusion of double murder (in spite of family pressure to do it).
They made their decision and made the announcement when they were ready to do it (and regardless of the family trying to take over the investigation and run it independently by themselves).
There's a case I'm keeping an eye on in the US: over 10 months later there's been no ruling on whether it was suicide or murder. Evidence can be inconclusive, or part of the investigation strategy can be to not release info.
JMO