Luigi Mangione will appear in court as his attorneys seek to have key evidence tossed from state murder case

By Nicki Brown, Kara Scannell, CNN New York (CNN) — 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.