I think that we have to be careful about getting too tied up on superfluous issues, like how the alarm system worked and if it was activated. Whatever the status of the alarm system, it had no impact on what happened in the Sherman home.
I may be wrong, and there may be other key factors, but some details I think should be focused on.
- Where did the assailants live while in Toronto. They had to live/stay somewhere, even if only for a few hours, before and after being at the Sherman home. If we know where they were, we may learn who they were.
- How did they travel in Toronto?
- How did the assailants communicate with one and other? Maybe only by voice and written notes.
- Were the assailants hired and paid? How was this done?
- Or were they acting on their own? Why?
Probably a number of other issues that can lead to a solution to the investigation as well.
MOO