There has to be a better way. The job of DA has gigantic powers and almost nothing you could call accountability; that’s a magnet for the Nifongs, Janet Renos, Ronnie Earles and Fitzgeralds of the world.
Most DA's are elected. They have the same accountability, to the voters, that any other elected office has. Democracy does not shield us from "psychopaths" that are sometimes voted in to various elected offices. The solution is to vote them out. However, this solution is often disregarded, witness the long career of Ted Kennedy.