A positive law created by state legislature or congress
A statute is a law, or regulation.
Re-phrase and re-submit question. Try to be more specific in what your are asking. Criminal SOL's and HIV don't appear to be synonymous.
Statutes are the laws passed by the US Congress or the State legislature.
Child molestation is normally charged as a felony. In that case there will be no statute of limitations. They can arrest you for it anytime during your life time.