Prosecution Service
The state's authority that decides whom to charge and brings criminal cases to court.
Purpose
A prosecution service represents the state in the enforcement of criminal law, deciding which cases to bring and carrying them through the courts. It stands between the police who investigate and the judges who decide, filtering evidence into charges that meet the legal standard. Its discretion — whom to charge, for what, and whether to offer a plea — makes it one of the most consequential actors in the justice system. In many civil-law countries it also supervises the legality of official action more broadly.
Structure — organs & roles
Prosecutor General / Attorney General
Heads the service, sets policy and represents it before the highest courts.
Regional and district prosecutors
Run offices across the territory and supervise line prosecutors.
Line (trial) prosecutors
Charge cases, negotiate pleas and argue them at trial.
Investigation / oversight of inquiry
Directs or supervises criminal investigations and their legality.
Specialized units
Handle organized crime, corruption, cyber and economic offenses.
Appeals division
Defends convictions and pursues appeals in higher courts.
Inputs & Outputs
Inputs
- Case files and evidence gathered by police and investigators.
- Complaints, referrals and reports of crime.
- The criminal code and rules of criminal procedure.
- Charging guidelines and prosecutorial policy.
Outputs
- Charging decisions and indictments.
- Plea agreements and diversion arrangements.
- Arguments and evidence presented at trial.
- Appeals of acquittals or sentences where warranted.
Mandate & Incentives
Mandate
The service is mandated to enforce the criminal law fairly and in the public interest, not merely to win convictions. It must charge only where the evidence is sufficient and prosecution serves the public interest, and disclose material that helps the defense. In many systems it is bound by the principle of legality — an obligation to prosecute provable crimes — while in others it enjoys broad discretion. Its overriding duty is to justice, which sometimes means declining or dropping a case.
Incentives
Prosecutors are pulled by conviction rates, caseload pressure and, where they are elected, by public appetite for toughness on crime. These incentives can tempt overcharging or resistance to reopening flawed cases, while limited resources force triage of which crimes to pursue. Professional norms, career advancement and the fear of a wrongful conviction scandal pull the other way. Political appointment of the leadership can align the service with the government, for good or ill.
Powers & Instruments
- Deciding whether, whom and what to charge.
- Directing or supervising investigations.
- Offering plea bargains and dropping charges.
- Requesting detention, warrants and coercive measures.
- Appealing rulings and sentences to higher courts.
Checks & Failure modes
Checks
- Judges who test the evidence and authorize coercive measures.
- Defense counsel and disclosure duties toward the accused.
- Internal hierarchy and professional-conduct rules.
- Public scrutiny, the press and, in some systems, elections.
Failure modes
- Politically motivated or selective prosecution.
- Wrongful convictions from suppressed or weak evidence.
- Overcharging to coerce guilty pleas.
- Capture by the executive that erodes independence.
- Backlogs and inconsistent charging that undermine fairness.
Real examples
Key terms
- Prosecutorial discretion
- The latitude to decide whether and how to pursue a case.
- Indictment
- The formal charge accusing a person of a specific crime.
- Plea bargain
- An agreement in which the accused pleads guilty for a reduced charge or sentence.
- Principle of legality
- The duty to prosecute all sufficiently proven offenses, leaving little discretion.
- Disclosure
- The obligation to share evidence, including material favorable to the defense.
- Burden of proof
- The prosecution's duty to prove guilt to the required legal standard.