• Video
  • Shop
  • Culture
  • Family
  • Wellness
  • Food
  • Living
  • Style
  • Travel
  • News
  • Book Club
  • Newsletter
  • Privacy Policy
  • Your US State Privacy Rights
  • Children's Online Privacy Policy
  • Interest-Based Ads
  • Terms of Use
  • Do Not Sell My Info
  • Contact Us
  • Recalls and Product Safety Alerts
  • © 2026 ABC News
  • News

Prosecutors trying to 'bias' the public against Luigi Mangione, defense says

2:52
Luigi Mangione prosecutors say they have evidence of his alleged motive
Curtis Means/Pool/Getty Images
ByAaron Katersky
June 20, 2025, 10:20 PM

Prosecutors at the Manhattan district attorney's office intentionally violated Luigi Mangione's right to a fair trial by unnecessarily releasing his handwritten journal entries to "bias" the public, defense attorneys said in a new court filing.

Prosecutors included the writings in a filing earlier this month that was meant to justify the filing of murder charges with a terrorism enhancement. One excerpt said, "I finally 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. I'm glad in a way that I've procrastinated bc it allowed me to learn more about UHC."

Related Articles

MORE: Prosecutors detail how Luigi Mangione allegedly surveilled CEO: 'Checks every box'

Mangione, who recently turned 27 in jail, is charged with murdering United Healthcare chief executive Brian Thompson after stalking him outside a Midtown hotel.

UnitedHealthcare CEO Brian Thompson.
Business Wire via AP

"The defense has provided irrefutable evidence that the search of Mr. Mangione's alleged backpack may be illegal, and its fruits may therefore be suppressed. In response, the prosecution pre-emptively released his alleged journal to the public. The prosecution's actions further no legitimate objective," the defense filing said. "The only rationale that makes sense is that the prosecution hopes to bias the public against Mr. Mangione and undermine his right to a fair trial."

Mangione's defense attorneys are trying to delay or dismiss the state's case to focus on the federal prosecution, which could get him the death penalty. He has pleaded guilty to both state and federal charges.

Related Articles

MORE: Luigi Mangione's online defense fund surpasses $1 million

"Forcing the defendant to choose between asserting a potential defense in the state court and giving the prosecution in his capital trial an unfair advantage presents the defense with an untenable choice with possibly fatal implications," defense attorneys said.

Luigi Mangione appears at a hearing for the murder of UHC CEO Brian Thompson at Manhattan Criminal Court, Feb. 21, 2025, in New York.
Curtis Means/Pool/Getty Images

Mangione is next due in court in September after a hearing previously set for June 26 was rescheduled. He is due in federal court in December, at which time the judge said she would set a trial date. It is still unclear which prosecution will proceed first.

He has pleaded not guilty to all charges. Prosecutors opposed a defense motion to suspend the state case in favor of the federal case, which Seidemann said could take years to try because of the government's intent to seek the death penalty.

He is being held in federal custody at the Metropolitan Detention Center in Brooklyn.

Up Next in News—

Psychiatrists testify that Lindsay Clancy did not show signs of psychosis

August 7, 2026

Man charged with attempted murder in alleged lobster diving incident speaks out

August 7, 2026

Cambridge professor resigns amid plagiarism allegations, questions about 'academic qualifications'

August 6, 2026

Lindsay Clancy's friend says she was having 'dark thoughts' prior to killing her children

August 6, 2026

Shop GMA Favorites

ABC will receive a commission for purchases made through these links.

Sponsored Content by Taboola

The latest lifestyle and entertainment news and inspiration for how to live your best life - all from Good Morning America.
  • Contests
  • Terms of Use
  • Privacy Policy
  • Do Not Sell My Info
  • Children’s Online Privacy Policy
  • Advertise with us
  • Your US State Privacy Rights
  • Interest-Based Ads
  • About Nielsen Measurement
  • Press
  • Feedback
  • Shop FAQs
  • ABC News
  • ABC
  • All Videos
  • All Topics
  • Sitemap
  • Recalls and Product Safety Alerts

© 2026 ABC News
  • Privacy Policy— 
  • Your US State Privacy Rights— 
  • Children's Online Privacy Policy— 
  • Interest-Based Ads— 
  • Terms of Use— 
  • Do Not Sell My Info— 
  • Contact Us— 
  • Recalls and Product Safety Alerts— 

© 2026 ABC News