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.
Courtroom Workgroup
The concept of a courtroom workgroup is associated with plea bargaining. The courtroom workgroup shows remarkable explanatory power in overburdened courts dealing with large caseloads. The courtroom workgroup model is best suited to explain jurisdictions where defense attorneys are more or less permanently assigned, but even occasionally appointed lawyers can participate in these practices. While many of the higher level prosecutions still follow the adversarial model, there is evidence that lower-level proceedings follow the courtroom workgroup model. Boland, Brady, Tyson, & Bassler (1983) indicate that approximately 90 percent of criminal cases are settled by plea bargain. This figure appears to be stable over the last twenty years (Rainville & Reaves, 2003). Some collaborative efforts on the part of the courtroom workgroup simply must be present to facilitate this high percentage of pleas.