Prosecutorial discretion is the authority of government prosecutors and law enforcement officers to decide whether, how, and to what extent to pursue legal action against a person — even when the law technically permits charges to be filed. It is one of the most powerful and often invisible forces in the justice system.
In the U.S. federal system, prosecutors have wide latitude to determine when, who, how, and even whether to prosecute apparent violations of law.
This power flows from the separation of powers doctrine — federal prosecutors act as agents of the executive branch and have historically been granted this flexibility by courts. The discretion is active at every stage: from the initial decision to investigate, through charging, plea negotiations, and final sentencing. [1][2][3]
The key rationale is resource allocation — most agencies simply cannot pursue every violation of law, and attempting to do so would overwhelm the justice system entirely.[4]