Mangione's hearing on state charges comes days after his dramatic return to New York to face federal counts in the slaying of Brian Thompson.

The man accused of fatally shooting the CEO of UnitedHealthcare is expected to be arraigned in a Manhattan court Monday on murder and terror charges in a state case that will run parallel to his federal prosecution.

Luigi Mangione is due in a New York courtroom to face state charges in the murder of UnitedHealthcare CEO Brian Thompson.