How do you know the brush handle was inserted into JonBenet?
I believe wood splinters were found in her vagina that may have matched the broken brush handle. These may have been on the autopsy report as "cellulose". I think it was one of the detectives present at the autopsy who said it, or it may have been the coroner's own comment in his notes, not all of which were included in his official report. His comment to detectives Arndt and Trulio, both present at the autopsy, that in his opinion there was evidence of digital penetration, was also not stated specifically in the report.