There was sex assualt evidence in the autopsy. Here's the summary-
http://jonbenetramsey.pbwiki.com/The%20Body
Dr. Lee (who examined JonBenet's body) on Fox News last evening indicated that while she may have been sexually abused, there was no penile penetration and therefore no sexual assault....there may be a contrast in terms here on what constitutes sexual assault/abuse...I'll just wait and see where the evidence takes this case....providing the police department don't screw this up...again....