Plea bargain

A plea bargain, sometimes called a plea agreement or deal, is a criminal law arrangement where a defendant admits guilt or pleads no contest in return for something from the prosecutor. That something might be a less serious charge, dropping some charges, or a lighter recommended sentence. The main purpose is to speed up case resolution, saving both sides the time, cost, and unpredictability of a trial. In the United States, this practice is extremely common, settling about 90% of criminal cases, and other legal systems around the world have adopted it in various ways.

There are different types of plea bargains. Charge bargaining means the defendant pleads guilty to a lesser offense. Sentence bargaining involves agreeing on the expected punishment before the guilty plea. Count bargaining happens when a defendant pleads guilty to only some of multiple charges. While plea bargaining can ease court workloads and give defendants a chance at lighter penalties, it also draws criticism. Opponents worry it pressures defendants, even innocent ones, to plead guilty because they fear worse punishment if convicted at trial. Supporters argue it saves judicial resources and brings certainty to everyone involved.

Plea bargaining has spread globally, especially in common law countries like the US and UK, but it varies a lot based on local laws and traditions. In civil law systems, it is usually banned or tightly controlled. Where it is allowed, judges often have the final say on whether to approve a deal, making sure the sentence fits public interest and justice. The practice remains controversial.

Supporters say plea bargaining is a voluntary trade that benefits both sides. Defendants give up their right to a trial and appeal in exchange for a prosecutor’s promise, like a reduced charge or lighter sentence. For a defendant who expects to be convicted anyway, a guaranteed discount is more useful than a slim chance of acquittal. The prosecutor gets a conviction without spending time and money on trial prep. It also saves court resources and spares victims and witnesses from testifying, which can be traumatic.

Critics, especially outside the US, argue that plea bargaining can involve coercion, threats, or rewards that endanger a fair outcome. Author Martin Yant has noted this coercive aspect. In the UK, the prosecutor’s code generally prohibits such tactics, though it allows them in complex cases like major fraud trials. John H. Langbein has compared the modern American plea bargaining system to medieval judicial torture.

There is also concern about innocent people pleading guilty. The prisoner’s dilemma scenario often applies: it benefits both suspects to confess and testify against each other, regardless of guilt. The worst case is when only one is guilty—the innocent one has no reason to confess, while the guilty one has a strong incentive to confess and possibly give false testimony. A 2009 study by the European Association of Law and Economics found that innocent defendants are more likely than guilty ones to reject favorable plea offers, even when it hurts them, because they see the deal as unfair. This “cost of innocence” is made worse by the “trial penalty”—harsher sentences for those who go to trial—which ironically penalizes innocents who reject deals on principle. The extent to which innocent people accept plea bargains is debated. Research has looked at cases where innocence was later proven through DNA evidence, hypothetical scenarios, and controlled experiments, such as a 2013 study by Dervan and Edkins that simulated an accusation of academic fraud to study real reactions.