I think you’re mistaken about the driveway being flat, or level. It appears to me that it’s sloped upward, with the garage being slightly higher in elevation than the road. Which makes it even more outrageous that the car rolled forward. It would have to stop moving backward, change direction, and roll up hill, in the opposite direction of the gear it was in.
I still think its level (take a look at the photo @post 80—the neighbor who was interviewed is standing at the fence, looking at the garage.) The brickwork looks flat (so if any grade at all, minimal)...but I agree that the explanation of rolling back into the garage, while in reverse, made by crime scene investigators makes no sense...to the point of being fiction.
as she backed up the inclined driveway.”
You are correct. Either the investigators or the journalist who wrote the story is/are obtuse, or are being intentionally misleading. She did not back up an inclined driveway, if anything she backed out onto a declining driveway. What they said is impossible unless she mistakenly put the car into D and drove into the workbench. Even then the scenario they paint is impossible with an engine coolant fire engulfing the garage before she could escape.
Clearly the corruption here runs very deep.
Yes, there is a slight bump at the door to keep rain out of the garage. But, of course, while a baseball would roll away from the garage but I can’t see how a big SUV would roll into the garge over the bump.