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
In the case of hybrid offences in England and Wales, the decision whether to deal with a case in Magistrates Court or Crown Court is not made by magistrates until after a plea has been entered. A defendant is thus unable to plead guilty in exchange for having a case dealt with in Magistrates' Court (which has lesser sentencing powers).