diff --git a/app/(protected)/supervisor/incidents/[id]/page.tsx b/app/(protected)/supervisor/incidents/[id]/page.tsx
index 98f0aef..ccab99f 100644
--- a/app/(protected)/supervisor/incidents/[id]/page.tsx
+++ b/app/(protected)/supervisor/incidents/[id]/page.tsx
@@ -4,6 +4,7 @@ import { notFound } from 'next/navigation'
 import Link from 'next/link'
 import { createClient } from '@/lib/supabase/server'
 import { IncidentDetail, type Incident } from '@/components/incidents/incident-detail'
+import { InvestigationPanel } from '@/components/incidents/investigation-panel'
 
 interface Props {
   params: Promise<{ id: string }>
@@ -30,12 +31,26 @@ export default async function SupervisorIncidentDetailPage({ params }: Props) {
 
   if (error || !incident) notFound()
 
+  const { data: investigation } = await supabase
+    .from('investigations')
+    .select(`
+      id, method, five_why_steps, fishbone_categories,
+      findings_text, root_cause_summary, alcohol_test_result, urine_test_result,
+      witness_statement_refs, completed_at,
+      investigator:users!investigator_id (name, email)
+    `)
+    .eq('incident_id', id)
+    .maybeSingle()
+
   return (
     <main className="max-w-3xl mx-auto px-4 py-6">
       <Link href="/supervisor/incidents" className="text-sm text-blue-600 hover:underline mb-4 inline-block">
         ← Back to inbox
       </Link>
       <IncidentDetail incident={incident as unknown as Incident} />
+      {investigation && (
+        <InvestigationPanel investigation={investigation as never} />
+      )}
     </main>
   )
 }