The Collision Reconstruction Report - Darcy Grabbing the Steering Wheel

The story about darcy possibly grabbing the steering wheel was being reported in real time. Only a few witnesses were in a vantage point where they could see darcy as he was hanging on to the car. The collision reconstruction report would state it plainly, there was no physical evidence or independent witness statement suggesting mister she ieffected the steering of the sab. So if we know now in hind sight, that not one witness had mentioned anything about darys grabbing the steering Wheel then why did the police state they were following up on witness accounts as though it was a confirmation that the reports were true? It turns out some reporters had noticed some odd occurrences the way the story had developed