Overview

• Court filings show Mangione kept a red notebook detailing his months-long plan to assassinate UnitedHealthcare’s CEO as a strike at what he called a “greed-fueled cartel.”
• Diary entries describe targeting Brian Thompson at the company’s annual investors conference to maximize symbolic impact while avoiding civilian casualties.
• Prosecutors paired the notebook with shell casings etched “delay,” “deny” and “depose” to frame the killing as premeditated terrorism under state and federal law.
• Mangione, 27, has pleaded not guilty to all charges and now faces concurrent state and federal proceedings where a capital sentence is on the table.
• The case has prompted threats against health insurance workers and drawn more than $1 million in donations to Mangione’s legal defense fund from online supporters.