diff --git a/src/components/ChartPanel.jsx b/src/components/ChartPanel.jsx
index 4f6fa8f..6c69d44 100644
--- a/src/components/ChartPanel.jsx
+++ b/src/components/ChartPanel.jsx
@@ -241,6 +241,22 @@ export default function ChartPanel({ district, state }) {
           without referral-rate covariates. All rates are per 1,000 students. Modelled distributions
           are drawn from the published posterior predictive draws, fetched in the browser.
         </p>
+        <p style={{ fontSize: '0.85rem', color: 'var(--cv-ink-2)', marginTop: 'var(--space-2)' }}>
+          <strong>Student groups not shown.</strong> The CRDC also reports arrests for Asian,
+          Hawaiian/Pacific Islander, and multiracial students. The underlying research does not
+          model these groups: it focuses on the four race/ethnicity groups where prior work has
+          documented the starkest disparities — Black and American Indian/Alaska Native students
+          relative to White students — with Hispanic students included for their large and growing
+          share of U.S. enrollment. Fitting every reported group would also have meant fitting 70
+          stratified models rather than 40. Their absence here reflects that scope, not a finding
+          about those students, and no estimate for them should be inferred from this page. See the{' '}
+          <a href="https://crdc-api.civilytics.org/api/v1/" target="_blank" rel="noopener noreferrer">
+            white paper
+          </a>{' '}
+          for the full rationale. Arrests that cannot be disaggregated by both race and sex —
+          including Section 504 students — are excluded upstream, as are schools not enrolling
+          grade 7 or above.
+        </p>
       </div>
     </div>
   )