Is this what Sidney Powell is up to?
A private prosecution is a criminal proceeding initiated by an individual private citizen or private organization (such as a prosecution association) instead of by a public prosecutor who represents the state. Private prosecutions are allowed in many jurisdictions under common law, but have become less frequent in modern times as most prosecutions are now handled by professional public prosecutors instead of private individuals who retain (or are themselves) barristers.
Sauce
https://en.wikipedia.org/wiki/Private_prosecution