Let me toss a monkey wrench in the works, then.
1. Someone involved in the organizational end of things might not necessarily have attended the event. For example, does everyone at the Heart and Stroke Foundation HQ attend every fundraiser, even fundraisers that are out of town?
Probably not, which is one of my points. I kind of doubt that someone in MEH's position would make the trek from Ottawa to Toronto for one of the many events the HSF was involved in.
2. Registration information for marathons and triathlons is often found online. With this particular event the registration surely must have been managed on a computer somewhere, if not online. Chances are that officials in the HQ for Heart and Stroke, for example, would have had access to that information, and may even have taken a laptop home. Registration information would include things like age and addresses. Someone with a background in electronic warfare and who allegedly hacked computers in victims' homes would surely find hacking a spouse's computer an easy job.
The registration was handled by the YMCA, who would likely have the pertinent info you mention. I see no reason why the HSF would also have these details or why RW would feel the need to look for victims on his wife's computer.
But even if we assume that this highly-unlikely (IMO) event occurred, how would RW choose from among the participants? (Never mind WHY.) How would he connect the name on a list to the girl at the races or in front of her school? Do you also believe that there were photos with these names? That the ONE day Mariam separated from her brother was the one where RW was waiting for her? It's all an incredible stretch, IMO.
I recall that RW's house in Westboro was within walking distance of Nepean High School. Who's to say that there weren't practice runs done there?
Sorry, I have no idea to what this is referring. What practice runs? Is there a teenage girl missing from Nepean HS? To link one high school in Ottawa to another in Toronto makes no sense. The physical layouts of the schools, the surrounding area, the traffic, etc. would be completely different in the two locations. Besides, see my Point #2; how would RW know what school MM attended (given all the arguments in my previous post)?
3. Busy, but still found time -- allegedly -- to do a whole number of things that were not work-related. Bodies can be disposed of in many ways that don't involve a lot of planning and effort, like rivers, for example. Has anyone given thought to that property at the UCC summer camp, for example? Remember RW callilng in sick from work coincidentally after one incident? No doubt busy people can beg off to a meeting or whatever.
True, but most of them involved jogging at night and spending week-ends with his wife. We're not talking about an unemployed loner here. A man in his position would find it difficult to unaccountably disappear for hours on a week-day morning. Again, I am convinced that LE has already checked RW's whereabouts on the day of Mariam's disappearance. Meetings are verifiable, as are most alibis.
Unplanned dumps in rivers almost always result in bodies being discovered - certainly within one year.
Additionally, MM's disappearance without a single witness or clue to her whereabouts smacks of a perfect (or extremely lucky) crime. It's very hard to believe that it was not meticulously planned and executed. Yet, two months later, MFC was murdered and her body left in her own home. Two months after that, Jessica is abducted - again from her own home. Her remains were dumped in an open area not far from her home. Tire tracks were carelessly left in a field near her home, leading to RW's arrest a mere ten days later. DNA was left at at least one of the break-in scenes. Most intelligent criminals do not digress from committing a "perfect crime" to several careless, stupid ones. They learn as they go along. RW was arrogant, but he had a lot at stake.
4. Do we really know MO? Isn't it possible that there are victims out there who remain unknown to LE? As I recall from the Fifth Estate documentary, one victim went home from work and later realized someone was in her house as she got ready to go out for the evening. Not the middle of the night by any means. When perps start increasing the rate of their crimes, does careful planning sometimes slip away? As we know, things do not always go smoothly, and Larry Jones' daughter caught a glimpse of someone in her house.
True. MOs can vary and RW could have veered from his, but to this extent? The examples you mention still involved home break-ins on quiet, rural Cosy Cove. Mariam was snatched at 8:30 a.m. from school property (or very close by) in a highly-traveled, densely-populated neighbourhood. I find it very unlikely that he would be desperate enough to take this risk.
5. Time will tell. LE is known for holding their cards close to their chest.
True again, but they have been unusually open about sharing the details of RW's charged crimes. I have never seen so many facts emerge from a crime that hasn't even been tried yet. If LE had even the slightest suspicion of his involvement in MM's case, why go on record saying that they are no further ahead than a year ago? Wouldn't it be better public relations to say they're working on leads (even if not naming RW)? I do believe that RW is probably guilty of more crimes than he has been charged with - just not Mariam's.
When it comes to reasonable doubt, I'd say this possibility should not be discarded yet.
You're certainly entitled to your doubts and suspicions, but for the reasons I have stated, I respectfully beg to differ.
JMO