I know that some service provider occupations tell their staff not to park in their clients' driveways, as a matter of policy. Is it possible the 'mystery man' could've been a physiotherapist or some such thing? First visit perhaps? Just arranged the day before possibly (ie on the Wednesday)? If it was a police officer, would they have sent out TWO officers to check up on a potentially bogus 911 call - it seems that both the officer at the other neighbour's door and the mystery man parked out front of the Sherman residence were there at the same time, so that would mean two separate officers, possibly also two separate police vehicles? Would that make sense in Toronto? Would an officer checking out a potentially bogus 911 call have spent an hour outside in the winter, going back and forth between vehicle and house, knocking on the door, etc, or would he possibly presume the occupants weren't home and decide to try again later, perhaps in the evening? I'm thinking Toronto officers are swamped, and wouldn't spend that much time on a call like that.
I think 'after the fact', they did spend time investigating how 911 calls are identified if they arrive in different ways, ie say by using random wifi, or perhaps data on a burner phone, or using some kind of spoofing software, etc. etc. etc., because by then, that time spent would've been worth it to investigate 'suspicious deaths'. At that point however, if it was THAT important for police to speak to someone at that house, or perhaps every house on the street(?), to try to determine where a 911 call could've originated, they perhaps could've found other means to identify and reach the owners?
I'm thinking along the lines of personal service provider - although I'm wondering if H would've allowed a male to perform services if she was alone in the house? I'm thinking the guy stayed about an hour.. and if say his appointment was for a one-hour slot, he still could've billed for that wasted hour (assuming of course, the people in the house hadn't been murdered already, at which point he was obviously SOL, imo.) Who else would've spent that much time at a person's door? Obviously the occupant was either not home, or not wanting to answer the door to this person. But jmo.