Luigi Mangione is accused of fatally shooting Brian Thompson. He says he needs a laptop to help review documents in the case.

In a filing in New York State Supreme Court reviewed by PEOPLE, his defense attorneys Karen Agnifilo, Marc Agnifilo and Jacob Kaplan said that given the volume of discovery material, there “are not enough visiting hours” for the suspected shooter to review the prosecution’s evidence that includes “thousands of hours of video.”

Luigi Mangione’s lawyer complained that authorities have “consistently leaked” material from a “manifesto” that is being used to portray the 26-year-old as a terrorist in the slaying of UnitedHealthcare executive Brian Thompson.