Luigi Mangione’s notebook writings, gun seized from his backpack will be allowed in upcoming murder trial, judge rules

feel confident about what I will do. The details are coming together. And I don’t feel any doubt about whether it’s right/justified,” Mangione wrote in an entry dated August 2024, according to prosecutors’ court filings. “I’m glad-in a way-that I’ve procrastinated [because] it allowed me to learn more about [UnitedHealthcare].”