Considering the car was owned by Cindy, used by Lee before Casey started driving it, and George worked on the family cars, of course there will be hair and other traces of them in said car.
With that said, I am sure that LE has to identify ALL trace evidence in that car along with any evidence of a decomposing Caylee in there, all for the purpose of putting forth a well analyzed report for this murder trial.
But Lee chose to refuse?? Either just a bit a drama on his part, or maybe he does have something to hide. Hmmmmmmmm :waitasec: