They are trying to convey that as he drove in, he had no intent to commit a crime so wasn't covering his tracks or paying extra attention to his surroundings. He didn't notice witnesses because they were not potential witnesses in his mind - he had no intentions of abduction. He perhaps made a split second decision to scoop up William because he was unattended, and could have plead he was being a good samaritan if caught in that process. I think they were giving BS a script to come confess. They were trying to make him nervous about what he missed as before he decided to abduct William.
Good points. I hadn't thought about the police implying that he may not have covered his tracks. I wonder if they have footage of one of his cars with the passenger or rear seat belt in use, since they hinted that William was wearing a seat belt.
When the police had finished meeting people who drove past Kendall Tennis Club that day, they said they had no new leads. I remember them saying that a lot throughout the investigation. It was very disappointing and frustrating. I took it to mean they weren't getting anywhere. I also remember them saying they were working to exclude people from the investigation.
I wonder if "no new leads" meant that they were still focusing on the same person, there was no one new to consider?
P.S. I can't see the FB anymore either.