He has been accused of a criminal offense.
No he has not. The FBI is not interested in doing an investigation on an incident that happened over 36 years ago over an adolescent party where there is no evidence. A she said he said and others present state it did not happen.
What you have here is:
1. Democrat Conspiracy to Smear a Supreme Court Nominee
2. an unprovable TEEN PETTING event
Only #1 deserves the scrutiny of an FBI investigation
So where’s the police report of this criminal accusation? Criminal cases do not go through a Senate committee evaluation of a Supreme Court nomination.
But it is not a "criminal prosecution."
In all criminal prosecutions, the accused shall enjoy the right to a speedy and public trial, by an impartial jury... (Amendment VI, COTUS)
Kavanaugh has not been charged with a crime.