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( NewsNation ) — Luigi Mangione, the man accused of killing UnitedHealthcare CEO Brian Thompson nearly a year ago, will be in court Monday in a bid to have key evidence thrown out.

Mangione’s team is looking to block the Manhattan District Attorney’s Office from showing or telling jurors about some items on his person when he was arrested.

That includes a 9 mm handgun and a notebook in which Mangione allegedly wrote about wanting to “wack” a health insurance executive.

Mangione’s lawyers argue the items should be excluded from evidence, as police did not have a warrant to search his backpack when they arrested him at a

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