Trader consensus around a 98% chance Luigi Mangione stays in custody through 2026 stems primarily from his August guilty plea to federal stalking charges tied to the 2024 killing of UnitedHealthcare CEO Brian Thompson, which carries a likely 24- to 30-year sentence with December sentencing looming. Parallel state murder and weapons proceedings continue despite double-jeopardy motions, with the next hearing set for December and no bail granted since his 2024 arrest. The federal trial has shifted into January 2027, locking in extended detention across both jurisdictions. Historical patterns in high-profile cases and the absence of viable release pathways reinforce this market-implied outlook. A realistic upset would require an unexpected state dismissal or successful bail motion before year-end, though current filings and court schedules make that outcome highly improbable.