@izzythepush,
The job of District Attorney in America seems to involve almost limitless power and very little resembling accountability; granted there is no shortage of good people who hold the job, the combination clearly attracts the wrong kinds of people as well and in the worst cases, the job has proved a natural magnet for psychopaths.
DA is often the first rung in the ladder of political careers and some of those careers are paved with the blood and shattered lives of innocents. Cases which are well known and easy to research on the internet include those of Janet Reno and her witch hunts (Grant Snoden, Bobby Fijnje, Frank Fuster, and a couple of others), Scott Harshbarger, Mike Nifong, Martha Cloakley who almost became a US senator from Massachusetts, Ronnie Earle who managed to convict Tom Delay of being a Republican, that lunatic sheriff of Wenatchee Wa. who almost succeeded in having Wenatchee disincorporated when it could no longer buy insurance, the prosecutors in that hideous David Camm case in Indiana... there doesn't seem to be any shortage of people who should not be holding that job.