Proving Discriminatory Effect and Intent in a Selective-Prosecution Claim

The Two-Prong Standard: Effect Plus Intent, Proven by Clear Evidence

A selective-prosecution claim borrows its standard from ordinary equal-protection law, and it has exactly two elements: discriminatory effect and discriminatory intent. The defense must show that the charging decision fell on the defendant while sparing others outside his group, and that the government chose him because of that group membership. Miss either element and the claim fails, however strong the other looks.

The claim also runs into a headwind the Supreme Court has deliberately built into the doctrine: the presumption of regularity. Federal courts presume that prosecutors have properly discharged their official duties, and only what the cases call clear evidence to the contrary displaces that presumption. In Oyler v. Boles, the Court held that the “conscious exercise of some selectivity in enforcement is not in itself a federal constitutional violation.” A United States Attorney may set priorities, husband limited resources, and charge some offenders while declining others. The constitutional line is crossed only when the selection is “deliberately based upon an unjustifiable standard such as race, religion, or other arbitrary classification.”

The Fifth Circuit frames the same requirement as a two-prong test. Under United States v. Johnson, a defendant bears the heavy burden of establishing, at least prima facie, first, that others similarly situated have not generally been prosecuted for conduct like his while he has been singled out, and second, that the government’s selection was invidious or in bad faith — resting on impermissible considerations such as race, religion, or the desire to prevent his exercise of constitutional rights. The first prong is the effect showing; the second is the intent showing.

One boundary matters before going further. This page covers the merits: what it takes to win dismissal. The separate, lower “some evidence” showing that unlocks discovery into the government’s charging practices is its own fight, covered on the companion page about the Armstrong discovery threshold. A defendant who cannot yet prove both prongs may still be able to earn the records that make proof possible, but at the end of the road the two-prong merits standard is what the motion must satisfy.

Proving Discriminatory Effect: Who Counts as Similarly Situated?

Discriminatory effect means the law was enforced unevenly along the protected line. The proof is a comparator: someone outside the defendant’s racial, religious, or other protected group who committed the same kind of violation, could have been prosecuted by the same office, and was not. Without a genuine comparator, the effect prong almost always fails.

What makes a comparator genuine is comparability on the facts that actually drive charging decisions. Courts look for the same offense conduct at a similar scale, similar strength of evidence, similar criminal history, and the same charging office in the same period. Every material difference — a larger loss amount, a weapon, a leadership role, a cooperating posture, a cleaner record — hands the government a neutral explanation for the disparity, and neutral explanations defeat the inference of unequal treatment. The tighter the match, the more the disparity itself begins to speak.

In practice the defense builds comparators from several sources: co-participants in the same scheme who were never indicted, referrals the same office declined for other suspects but accepted for the defendant, charging data broken out by statute and district, and investigative or task-force records showing who was identified, investigated, and dropped. The comparator showing is factual, not rhetorical — names, case numbers, conduct descriptions, and outcomes, presented so the court can line the cases up side by side.

Timing shapes this work. Much of the best comparator material sits in government files, which is why the effect prong is usually litigated twice: once at the discovery stage under the lower threshold, and again on the merits with whatever the discovery fight produced. Counsel who treat the two showings as one — filing a merits motion on the thin public record — give the court an easy denial. The disciplined sequence is to assemble the public-record comparators first, use them to justify discovery, and reserve the merits motion for the enriched record.

Oyler adds a qualification about knowledge that still controls. The record there suggested that many eligible repeat offenders were never charged under West Virginia’s recidivist statute, but nothing showed that prosecutors knew of those offenders’ prior records. A failure to prosecute others because of a lack of knowledge of their offenses does not deny equal protection. Comparator evidence therefore has to show that the government knew about the similarly situated person and still declined to act. An office cannot be faulted for disparities it never saw; it can be called to account for the ones it saw and chose.

Proving Discriminatory Purpose: Because Of, Not In Spite Of

Discriminatory intent is the second, independent element, and it demands more than proof that the government understood who would bear the brunt of its enforcement choices. The defense must show the decisionmaker selected the course of action at least in part because of, and not merely in spite of, its adverse effects on the defendant’s group. Awareness of impact is not purpose.

In McCleskey v. Kemp, the Supreme Court put the burden squarely on the defendant: a claimant must prove the existence of purposeful discrimination, and must prove that the purposeful discrimination had a discriminatory effect on him — meaning the decisionmakers in his own case acted with discriminatory purpose. General grievances about systemwide patterns do not substitute for case-specific proof. That framing traces the two-part test the Court announced in Wayte v. United States, the landmark treated on the parent page.

Purpose can be proven directly or circumstantially. Direct evidence is what it sounds like: statements by the charging prosecutor or investigating agents, internal memoranda, or contemporaneous communications tying the decision to race, religion, national origin, or the defendant’s protected activity. Circumstantial proof is more common: unexplained departures from the office’s written charging criteria, an irregular sequence of events surrounding the decision, a documented history of enforcement against one group, or remarks made during the investigation that betray the real criterion. No single thread has to carry the load; the question is whether the mosaic shows the forbidden factor did real work in the decision.

The intent prong also covers retaliation for protected rights. Under Johnson’s second prong, a selection driven by the desire to prevent the defendant’s exercise of constitutional rights — speech, association, petitioning the government — is invidious in the same way a race-based selection is. The government does not get to punish the exercise of a right it could not prohibit directly.

What Statistics Can and Cannot Prove

Statistical disparity sits at the center of most selective-prosecution claims, and the case law marks both its power and its limits. A pattern can be so stark that it proves the whole case; ordinary disparity, standing alone, proves neither prong. The two poles are Yick Wo and McCleskey.

In Yick Wo v. Hopkins, San Francisco denied laundry permits to roughly two hundred Chinese applicants while granting them to non-Chinese operators with a single exception. The Supreme Court held that a law fair on its face violates equal protection when it is “applied and administered by public authority with an evil eye and an unequal hand.” The administration was directed so exclusively against one class that the numbers themselves warranted the conclusion of purposeful discrimination — a stark, near-total pattern carrying both effect and intent.

At the other pole, McCleskey v. Kemp confronted a sophisticated regression study showing racial disparities in Georgia capital sentencing. The Court assumed the study’s validity and still held it clearly insufficient to support an inference that the decisionmakers in McCleskey’s own case acted with discriminatory purpose. Discretionary charging decisions turn on innumerable case-specific factors, so aggregate correlation cannot convict a particular prosecutor of a particular motive.

The practical lesson: statistics frame the claim and give it scale, but named comparators prove effect, and purpose evidence — direct or circumstantial — proves intent. A motion built on numbers alone is a McCleskey motion; a motion built on numbers plus comparators plus motive evidence is a real one.

Which Classifications Are Unjustifiable?

Not every uneven enforcement choice is unconstitutional; only selections that rest on an unjustifiable standard are. The settled core is race, religion, and other arbitrary classifications, plus retaliation for the exercise of protected rights. Selections based on legitimate enforcement criteria — offense severity, evidence strength, deterrence value — are the ordinary business of prosecution.

Oyler supplies the canonical phrase: selection may not be “deliberately based upon an unjustifiable standard such as race, religion, or other arbitrary classification.” The Fifth Circuit’s Johnson formulation adds the rights-retaliation branch expressly, condemning selections grounded in the desire to prevent the exercise of constitutional rights. But Johnson also draws a line that surprises many defendants: enforcement is not impermissible solely because it focuses on those most vocal in opposing the law they are accused of violating. The government may rationally prioritize visible violators — for deterrence, for example — without that priority alone proving bad faith. The defense must still tie the selection to the protected characteristic or right itself.

A related boundary comes from United States v. Batchelder. When the same conduct violates two overlapping federal statutes with different penalties, the prosecutor may choose either one, and may even be influenced by the heavier sentence, so long as the choice does not discriminate against any class of defendants. The severity of the charging choice is not itself the violation; the classification behind it is. A defendant complaining that he was charged under the harsher of two available statutes has no claim unless he can show the selection between defendants — not between statutes — turned on race, religion, another arbitrary class, or protected activity.

The unifying principle across these cases: the Constitution polices the criterion of selection, not the fact of selection. The motion succeeds by naming the forbidden criterion and proving it did the work.

Raising the Claim Under Rule 12 and What a Win Looks Like

Selective prosecution is a defect in instituting the prosecution, so it must be raised by pretrial motion under Rule 12(b)(3)(A)(iv) if the basis for it is reasonably available. Wait until trial and the claim is untimely absent good cause. The motion is decided by the court, not the jury, because it attacks the charging decision rather than guilt.

A serious motion is built like a case-in-chief. It attaches the comparator proof — declarations, charging records, investigative documents — lays out the statistical frame, and presents the purpose evidence, direct and circumstantial. Where material facts are disputed, the defense asks for an evidentiary hearing and, where the threshold showing supports it, pairs the merits motion with a discovery motion under the standard covered on the Armstrong companion page. The government typically answers with the presumption of regularity and neutral explanations for each disparity; the reply’s job is to close those escape routes with the tightness of the comparator match.

The remedy for a proven claim is dismissal of the tainted charges. Because the violation infects the decision to prosecute rather than the trial, suppression or jury instructions are not the fix; the indictment itself falls. Courts grant that relief rarely, and the case law says so openly — the standard is demanding by design, out of respect for a coordinate branch’s charging power.

Realistic expectations still leave real value. The motion forces the government to articulate its reasons on the record, exposes charging criteria to judicial scrutiny, and preserves the constitutional issue for appellate review. And in the small class of cases with genuine comparators and genuine motive evidence — the cases this page describes — the two-prong standard is not a wall; it is a checklist. Effect, proven by people; intent, proven by reasons. A motion that delivers both is the rare one courts take seriously.

Where This Fits

This guide is one of four situations that arise under the Motion to Dismiss for Selective or Vindictive Prosecution. Start with the parent motion for the overall framework, or move to a related fact pattern:

What the Case Law Says

These decisions—verified against primary sources—control how this issue is litigated. Every case still turns on its own facts.

• Yick Wo v. Hopkins, 118 U.S. 356 (1886) — A law fair on its face violates equal protection when administered with an evil eye and an unequal hand against one class.
• Oyler v. Boles, 368 U.S. 448 (1962) — Conscious selectivity in enforcement is unconstitutional only when deliberately based on an unjustifiable standard such as race, religion, or another arbitrary classification.
• United States v. Batchelder, 442 U.S. 114 (1979) — When conduct violates two overlapping statutes, the prosecutor may charge under either so long as the choice does not discriminate against any class.
• McCleskey v. Kemp, 481 U.S. 279 (1987) — A statistical study showing racial disparity is insufficient to prove the decisionmakers in a particular case acted with discriminatory purpose.
• United States v. Johnson, 577 F.2d 1304 (5th Cir. 1978) — A selective-prosecution defense requires prima facie proof the defendant was singled out among similarly situated offenders and the selection was invidious or in bad faith.

General summaries of published opinions for information only — not predictions about any specific case.