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.
Pleading
In the United States, a "complaint" is the first pleading filed by a plaintiff which initiates a lawsuit. A complaint sets forth the relevant allegations of fact that give rise to one or more legal causes of action along with a prayer for relief and sometimes a statement of damages claimed (an ad quod damnum clause). In some situations, a complaint is called a "petition", in which case the party filing it is called the petitioner and the other party is the respondent. In equity, sometimes called chancery, the initial pleading may be called either a "petition" or a "bill of complaint in chancery".