Thank you for putting that together. This would explain why it is believed that she went into the creek East of the culvert. She was found on the West side of the culvert.
"T5, #701 - March 21
There is a reason police focused primarily upstream [east side of culvert] on there search of the area. They did use dogs. I don't want to comment on what police have not released at this time. Personally I think it has a great vantage point of traffic from all 3 directions and is a convenient location to back in and place a body into the culvert."
But what is the explanation for the animal blood?
I have no idea. A bizarre red herring? An intended indication that no one was sitting in the passenger seat? For a while, beginning prior to the police chief's last burst of info, I've been tossing around the idea that someone (seemingly?) familiar approached Cheryl asking for a ride to the P&R as she got in her car at home.