A plea bargain (or plea deal) occurs when the prosecution and defense negotiate and agree upon the appropriate resolution of a criminal case. There are several types of plea bargain (see What are the different kinds of plea bargaining?), but no agreement is binding until the parties present it to a judge who approves it.
To evaluate a proposed plea bargain, the judge must know all the terms of the deal, including any future conditions or unusual aspects. For example, if Donnie Defendant is offered a lighter sentence in return for future testimony against a codefendant, the parties must make this condition clear to the judge when presenting the terms of the plea. Similarly, the parties would have to inform the judge if there is anything unusual in how he is to complete his sentence—for example, if the terms of the plea require him to perform 600 hours of community service, but only on weekends.
A judge has discretion to decide whether to accept or reject a plea agreement. To make that decision, the judge evaluates whether the punishment is appropriate in light of the seriousness of the charges, the defendant's character, and the defendant's prior criminal record.
Other factors to consider include:
While plea procedure varies from judge to judge and jurisdiction to jurisdiction, judges must always decide whether to accept the plea terms before the defendant actually enters the plea.
When judges decide on a proposed plea bargain, they may be able to:
In some jurisdictions, if the prosecution and the defendant agree to a sentence and the judge accepts the negotiated plea, that judge must accept the entire agreement, including the agreed-upon sentence. In other jurisdictions, even when accepting a plea agreement, the judge isn't required to accept the sentencing recommendation. Some jurisdictions require that the accused be given the opportunity to withdraw the plea if the judge doesn't follow the sentencing recommendation. (See Withdrawing a Guilty Plea.)
When judges refuse a proposed plea bargain, they must follow their jurisdiction's procedure, which usually requires that they identify on the record the reasons for not accepting the deal.
Once the judge accepts the defendant's guilty or no contest plea and enters a conviction, that judge can't later overturn the plea agreement. However, when the parties agree upon a negotiated plea that requires that the defendant perform certain conditions, the court retains jurisdiction until the conditions are satisfied. If the defendant doesn't satisfy the conditions, the judge can reject the plea and resentence the defendant. An example is a defendant who, in order to receive community service instead of jail time, agreed to but failed to complete the assigned service.
If you want to know whether a judge might reject an actual or potential plea bargain, or if you simply want to understand plea-bargain procedure, talk to an experienced criminal defense lawyer. Do the same if you want to know what your options are. A knowledgeable lawyer will be able to fully explain the rules and customs—which differ from place to place—in the court in question.