Luigi Mangione will be back in court Friday as a crucial court hearing about what evidence should be admitted in the trial continues.

Mangione's defense is arguing that evidence including his backpack and its contents - a 9mm pistol with a silencer and a notebook filled with writings expressing disdain for the health insurance industry - should not be admitted, saying it was unlawfully searched without a warrant .

The hearing is related to his state case in New York. Mangione, 27, still faces federal charges that could result in the death penalty in the killing of Brian Thompson, the UnitedHealthcare CEO shot dead in the street while attending an investors conference in New York City last year.

More officers who initially arrested Mangione at a McDonald's in A

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