Well many think that she was driving in tandem or somehow got a ride, or that she crossed later. Maura's case was very "local" the first few days. There would have not been a BOLO at the border. Plus, Maura was an adult who was free to go to Canada. She was not wanted for any crime. I do not think that she would have been reported to the Canadian authorities, as there would have been no legal justification for doing so.
I do not think that anyone who supports the Canada theory thinks that Maura walked there that night.
I do not think that anyone who supports the Canada theory thinks that Maura walked there that night.