Here’s a good piece in the New York Times on current trends in plea bargains.
“We now have an incredible concentration of power in the hands of prosecutors,” said Richard E. Myers II, a former assistant United States attorney who is now an associate professor of law at the University of North Carolina. He said that so much influence now resides with prosecutors that “in the wrong hands, the criminal justice system can be held hostage.”
One crucial, if unheralded, effect of this shift is now coming into sharper view, according to academics who study the issue. Growing prosecutorial power is a significant reason that the percentage of felony cases that go to trial has dropped sharply in many places.
Plea bargains have been common for more than a century, but lately they have begun to put the trial system out of business in some courtrooms. By one count, fewer than one in 40 felony cases now make it to trial, according to data from nine states that have published such records since the 1970s, when the ratio was about one in 12. The decline has been even steeper in federal district courts.