Plea bargaining in the United States
The constitutionality of plea bargaining was established by "Brady v. United States" in 1970, although the Supreme Court warned that plea incentives which were sufficiently large or coercive as to over-rule defendants' abilities to act freely, or used in a manner giving rise to a significant number of innocent people pleading guilty, might be prohibited or lead to concerns over constitutionality. "Santobello v. New York" added that when plea bargains are broken, legal remedies exist.
Plea bargaining in the United States
Plea bargains are so common in the Superior Courts of California that the Judicial Council of California has published an optional seven-page form (containing all mandatory advisements required by federal and state law) to help prosecutors and defense attorneys reduce such bargains into written plea agreements.