Someone on the MSNBC panel just said that democrats in Maryland are looking into the possibility of criminal charges. There is no statute of limitations for sexual assault in Maryland if charged as a felony.
statelaws.findlaw.com/maryland-law/maryland-rape-and-sexual-assault-laws.html
I don't know how the Blasey-Ford threats were delivered, but threatening the life of Mrs. Kavanaugh over email would almost certainly be a federal offense.