The issue raised here has nothing to do with a statute of limitations. It is suggested that your friend retain an experie ced criminal defense attorney and they can investigate the claim and file the necessary documents to get the case back in court.
This does not really affect the Statute of Limitations. There are often issues with timeliness with these types of matters, but I think we can find a way around that timeliness issue.
This is not intended as individual legal advice and there is no attorney client relationship established by this answer. It is advisable that you seek individualized legal assistance. This is not a substitute for hiring an attorney.