Luigi Mangione, the 27-year-old accused of fatally gunning down UnitedHealthcare CEO Brian Thompson last December in New York City, is expected to appear in court Monday in Manhattan.

The defense argues certain evidence should not be allowed during trial, so the judge has scheduled a series of suppression hearings , which are expected to last several days, possibly a week.

The evidence that Mangione's defense wants to suppress at trial

Mangione's defense attorneys argue statements he made to law enforcement should be suppressed because they claim officers failed to provide Miranda warnings, which is when a suspect is informed of their constitutional rights.

The defense also argues evidence seized at the time of his arrest at a McDonald's in Altoona, Pennsylvania , shouldn't

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