Luigi Mangione appears in Manhattan Supreme Court in New York City on September 16 for a hearing on his state murder charges. Curtis Means/Pool/Getty Images New York —

Luigi Mangione, the 27-year-old accused of killing a health insurance company executive in a brazen attack that sparked a national debate, will appear in court Monday as his attorneys seek to have his diary entries and other key evidence tossed from his state murder case.

Mangione was arrested at a McDonald’s in Pennsylvania following a days-long manhunt after United Healthcare CEO Brian Thompson, 50, was fatally shot December 4, 2024, on a busy sidewalk in midtown Manhattan.

During the arrest, law enforcement recovered several pieces of evidence from Mangione’s backpack that authorities say tie him to the ki

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