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 bargain
Certain aspects of the American justice system serve to promote plea bargaining. For example, the adversarial nature of the U.S. criminal justice system puts judges in a passive role, in which they have no independent access to information with which to assess the strength of the case against the defendant. The prosecutor and defense may thus control the outcome of a case through plea bargaining. The court must approve a plea bargain as being within the interests of justice.