NEW YORK — Luigi Mangione is back in court on Tuesday for the second day of a hearing in his bid to bar New York prosecutors from using some key evidence they say links him to last year’s killing of UnitedHealthcare CEO Brian Thompson.

Various law enforcement officers are taking the witness stand Tuesday.

The pretrial hearing in Mangione’s state murder case has featured surveillance videos of the killing on a Manhattan sidewalk and security footage of his arrest five days later at a McDonald’s in Altoona, Pennsylvania.

Lawyers for Mangione, 27, want to block prosecutors from showing or telling jurors at his eventual Manhattan trial about statements he allegedly made and items authorities said they seized from his backpack during his arrest. The objects include a 9 mm handgun that prosec

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